SIMOLIO 2.4GHz Wireless TV Earphones
User Manual
Overview
The SIMOLIO SM-828D1 / SM-828D2 wireless TV hearing assistance and protecting earphone is designed to provide crystal-clear sound for watching television without disturbing others and to prevent hearing damage from prolonged use of standard wireless earphones. Utilizing 2.4GHz Digital Automatic Frequency-Hopping Spread Spectrum (FHSS) technology, it offers a wireless connection up to 100 feet. Users can customize their listening experience with balance and tone controls. The voice highlighting and noise-cancelling technology enhances TV dialogues by reducing background sounds and ambient noise, making speech easier to understand at a safe volume.
This system is particularly beneficial for hearing-impaired individuals, offering an improvement over regular hearing aids that amplify all sounds equally. It is compatible with most digital and analog audio output ports found on TVs and set-top boxes. The product includes a magnetic charging stand for convenient charging.
Features
- Wireless TV Hearing Assistance and Hearing Protection: Softens background sound, enhances TV conversations, and protects hearing from progressive damage caused by prolonged use of standard earphones.
- By-pass: Allows simultaneous use of the wireless TV earphone and a soundbar/audio system.
- Long Distance Transmission: Provides wireless freedom and clear voice up to 100 feet.
- Voice Highlighting Tech: Reduces background TV noise to emphasize dialogues.
- Noise Cancelling Tech: Minimizes ambient noise for better focus on TV dialogues.
- Automatic Signal Control: Dynamically adjusts sudden volume changes for stable output, preventing hearing damage.
- BALANCE Control: Allows adjustment of left/right volume for equal hearing in both ears.
- TONE Control: Offers Treble/Normal/Bass settings to optimize sound for individual hearing sensitivities.
- MONO/STEREO Optional: Switch between STEREO for Hi-Fi music or MONO for clearer TV dialogues.
- Multiple Charging Solutions: Charge via magnetic charging stand, included USB cable with a compatible USB charger (like mobile phone chargers), or use a spare battery stored in the transmitter.
- Auto Power Off Function: The earphone automatically powers off after 10 minutes of no audio signal to save power.
- One Transmitter Supports Multiple Receivers: Additional SIMOLIO 2.4GHz wireless receivers can be added to the system for multiple listeners.
- Good Compatibility: Works with any TV, cable box, set-top box, DVD, or audio device with Digital Optical, RCA, or 3.5mm AUDIO OUT ports.
- Variety of Ear Tips: Includes replaceable, washable silicone ear tips and additional memory foam ear tips for comfort and to reduce irritation.
Product Diagram
The product includes a transmitter and earphones. The transmitter features magnetic charging slots, ports for power (DC 5V), audio input (OPTICAL IN, AUX IN), audio output (OPTICAL OUT, AUX OUT), a STEREO/MONO/OFF switch, and an ON/OFF switch. It also has LED indicators for wireless receiving and charging, a TONE control (TREBLE/NORMAL/BASS), and a compartment for a spare battery. The earphones have magnetic charging contacts, a built-in Li-battery, an ON/OFF switch, volume control (+/-), a BALANCE control (L BAL R), and a wireless receiving indicator LED.
Package Contents
- Earphone (2 units for SM-828D2, 1 unit for SM-828D1)
- Transmitter
- Optical Fiber Cable
- 3.5mm Audio Cable
- 3.5mm-RCA Audio Cable
- USB Charging Cable
- A spare Li-battery for earphone (included)
- Power Adapter (US or UK)
- Ear Tips (Silicone x1 pair, Memory Foam x2 pairs)
- User Manual
- Quick Guide
LED Indication
LED Indicators of the Transmitter
| LED Status | Transmitter Status |
|---|---|
| Green LED flashes slowly | No signal received within 5 minutes |
| Dark green LED lighting steadily | In standby mode (no audio signal in for more than 5 minutes) |
| Bright green LED lighting steadily | Wireless working mode |
| Red LED lighting steadily | Earphone charging |
| Red LED lighting steadily | Spare battery charging |
| Red LED off | Earphone charging completed/no charging |
LED Indicators of the Earphone
| LED Status | Earphone Status |
|---|---|
| Green LED flashes slowly | No signal received |
| Green LED flashes quickly and Earphone beeps every minute | Low power indication |
| Green LED lighting steadily | Wireless working mode |
How to Use
Important Notes: The transmitter automatically enters standby mode after 5 minutes of no signal and restarts when an audio signal is detected. The earphone powers off after 10 minutes of no audio signal; slide its ON/OFF switch to OFF and then back to ON to reactivate.
1. Check Your TV/Audio Source Output Options before Setup
The SM-828D1/SM-828D2 is compatible with OPTICAL output, RCA (labeled “AUDIO OUT”), and AUX 3.5mm output. Ensure your TV or audio source has one of these ports. If using optical or 6.35mm phone jacks, adapters may be required.
2. Turn on the Transmitter and Earphone
- Power the Transmitter: Connect the supplied AC adapter to a power outlet and the transmitter's DC 5V port.
- Turn on the Transmitter: Slide the MONO/STEREO/OFF switch to either “MONO” or “STEREO”.
- Turn on the Earphone: Slide the ON/OFF switch to “ON”. It is recommended to charge the earphone for 3 hours before first use.
3. Connect the Transmitter to Your TV/Audio Source
Set your TV/audio source volume to a level sufficient for clear listening (e.g., TV box VOL ≥ 30%, TV VOL ≥ 40%). For quiet viewing, mute the TV or select an output other than TV speakers. The system includes digital optical, RCA, and 3.5mm cables; use only one to connect. Prioritize the optical audio out port if available.
3.1 Digital Optical Connection
Connect the optical audio cable from the TV's “Digital Audio Out (Optical)” port to the transmitter's “OPTICAL IN” port. Ensure plastic caps are removed from the cable ends. If connecting via a TV box, follow similar steps. Keep the transmitter base at least 4 feet away from routers or Wi-Fi devices to prevent interference.
TV Audio Format and Speaker Setting: Ensure the TV's Audio Format is set to “PCM” (or disable Dolby/DTS). Set the TV speaker output to “External Speakers”. Some TVs may require specific settings for simultaneous internal and external speaker output.
3.2 RCA Analog Connection
Connect the red and white ends of the RCA audio cable to the TV's “AUDIO OUT” ports and the single end to the transmitter's “AUDIO IN” port. If connecting via a TV box, follow similar steps. Maintain a distance from routers/Wi-Fi devices.
TV Audio Out Checking and TV Speaker Setting: Verify the TV is using the correct “AUDIO OUT” or “OUTPUT” ports. Set the TV speaker output to “External Speakers”. If your TV only supports single sound out, it may mute its internal speakers. Some TVs allow controlling volume separately via a “Fixed” setting; consult your TV manual.
3.3 3.5mm/AUX Analog Connection
Connect the 3.5mm audio cable from the TV's “Audio Out” (often a headphone port) to the transmitter's “AUDIO IN” port. This may mute the TV's internal speakers. Keep the transmitter at least 4 feet from routers/Wi-Fi devices.
TV Audio Out / TV Speaker Setting: Ensure the TV speaker is set to “Headset”. Test the TV sound using wired headphones connected to the TV's 3.5mm audio out port. Your TV's audio settings might be “Variable” or “Fixed”; “Fixed” is recommended for independent volume control.
3.4 Other Connections in Special Cases
1) TV/Audio Source with Digital Coaxial Audio Out Port
A Digital to Analog Converter (DAC) is required. Connect the coaxial cable from the TV to the DAC's coaxial input, and then use RCA cables from the DAC's RCA output to the transmitter's AUDIO IN. Test audio output from the DAC using headphones. Ensure TV audio format is PCM and speakers are set to External.
2) Optical Audio Out Port Occupied (By-pass Feature)
If the optical port is used by a soundbar, use the by-pass feature with the same cable type. For optical connections, use an optical cable from the TV to the sound system, and another optical cable from the sound system to the transmitter. For AUX/RCA connections, use AUX/RCA cables similarly.
3) Connecting to an AV Receiver with 6.35mm PHONE Jack
Use a 6.35mm to 3.5mm adapter. Connect the adapter to the AV receiver's 6.35mm headphone out port, then connect the 3.5mm audio cable from the adapter to the transmitter's AUDIO IN. Test the AV receiver's audio output with wired headphones.
4. Use Two Sets of SIMOLIO 2.4GHz Wireless TV Earphones Simultaneously
Place the two sets at least 10 meters apart. Bring the earphone close to the transmitter, turn both on, and ensure their green LED indicators face each other for about 5 seconds. One transmitter can support multiple earphones.
5. Charge the Earphone
- Method 1 (Charging Stand): Place the earphone on the magnetic charging stand. The charging indicator stays red during charging and turns off upon completion.
- Method 2 (USB Cable): Connect the earphone to a USB wall charger (5V/0.5-2A) using the included USB cable. The earphone's LED turns red while charging and turns off when complete (approx. 3 hours).
- Method 3 (Spare Battery): The transmitter has a spare battery compartment. Replace a low-power earphone battery with the spare, and place the discharged battery in the compartment for recharging.
Charging time is approximately 3 hours. Earphones provide about 7 hours of playback, varying with volume.
6. Customizing your SM-828D1 / SM-828D2
- Balance Control: Adjust the BAL dial on the earphones for optimal left/right volume balance.
- Tone Control: Use the TONE switch (TREBLE/NORMAL/BASS) on the transmitter to find the clearest sound.
- Mono/Stereo Option: Select STEREO for music or MONO for clearer TV dialogues. If sound is only heard in one ear, try setting the switch to MONO.
- Cleaning Silicone Ear Tips: Gently remove ear tips, clean with warm soapy water, rinse, and dry thoroughly. Reattach to the earphone.
Troubleshooting
Part 1
| Phenomena | Causes | Solutions |
|---|---|---|
| Earphone doesn't work, or no voice received | The transmitter is not powered on. | Switch to MONO or STEREO to power the transmitter on. |
| The transmitter is not connected well. | Make sure the AC adapter and the audio cable of the transmitter are plugged in place. | |
| The analog audio cable is plugged into the AUDIO IN jack of the transmitter when connecting with the optical cable. | Unplug the analog audio cable from the transmitter. | |
| The connection between the transmitter and the audio source is wrong. | Make sure the connection is correct and in place between the transmitter and the audio source. | |
| The audio sources (TV and TV related AV devices) are not turned on or their volume are set too low. | Turn on the audio source, and adjust its volume to a sufficient level. | |
| TV audio output is disabled or not activated. | Follow the instructions in your TV user manual to change the TV's AUDIO OUT setting to "External TV Speakers". | |
| The audio out format of TV and TV related AV devices (e.g., Cable box, STB, DirecTV, etc.) is not set to PCM. | Set it to PCM. For example: Settings > Sound > Digital Audio Out Format>Dolby/DTS/PCM, menu depends on TVs. | |
| Earphone doesn't work, or no voice received | The earphone is powered off automatically. | Switch the earphone off, then on. |
| The battery isn't inserted properly into the battery chamber or the battery is run out. | Insert the battery properly, or charge the battery fully. | |
| The audio out port of the connected audio device is defective(no signal out). | Connect to another audio out port. |
Part 2
| Phenomena | Causes | Solutions |
|---|---|---|
| Earphone doesn't work, or no voice received | TV volume is turned down to ZERO. | Adjust the TV volume to a sufficient level. If you want to mute the TV, please click the MUTE key on the TV remote control or go to Tvsettings to OFF the Internal TV speaker. |
| The earphone is out of the transmitting range. | Move the earphone closer to the transmitter. | |
| The audio source's volume is set too low. | Adjust its volume properly. | |
| The battery's power is too low. | Charge the battery fully. | |
| The transmitter is placed too close to metalworks or other electromagnetic wave objects. | Put the transmitter far away from the interference sources. | |
| The connection between the transmitter and the audio source is not in place. | Make sure the connection is firm between the transmitter and the audio source. | |
| Sound cuts in and out or some noise is occurred | The audio out function of the connected audio device is defective (poor signal out). | Connect to another audio out port. |
| The earphone is used for listening to streaming media (Netflix, Amazon Prime Video etc.) | Place the transmitter base at least 4 feet away from smart WiFi TV/ WiFi TV box/TV sticks to avoid interference. | |
| The balance is not adjusted properly. | Adjust the balance control properly. | |
| The audio out signal of audio source is mono, but the transmitter is switched to STEREO. | Switch the transmitter to MONO. | |
| The voice is heard only with one ear | If you are using RCA connection, the two ends of the RCA audio cable are not fully inserted into the RCA audio out port of the TV/other audio source. | Try waggling the RCA audio cable or re-inserting the RCA audio cable |
| The voice is heard only with one ear | Faulty cable/audio out port issue | Try another audio cable or another audio device. |
Part 3
| Phenomena | Causes | Solutions |
|---|---|---|
| Earphone can not be charged successfully | The transmitter is not switched on. | Switch on the transmitter. |
| One of the charging slots is defective. | Put the battery in the battery charging compartment of the base or change another charging slot for recharging. | |
| The battery is not inserted into the battery compartment in the correct way resulting in the battery contacts distorted. | Replace with a new earphones.(damage due to misuse, not covered by warranty) | |
| Faulty USB adapter. | Please unplug the faulty USB adapter and change another power source like PC USB port, socket, different USB charger (5V/500mA-2A). | |
| Faulty USB charging cable. | Please try another USB charging cable. | |
| No sound when using by-pass feature | Incorrect input/output connection. | If you're using Optical cable to connect the wireless transmitter to TV, please use Optical cable to connect to the sound system. If you're using the AUX/RCA cable to connect the wireless transmitter to TV, please use AUX/ RCA cable to connect to sound system. |
Limited Warranty
SIMOLIO offers a 12-month limited warranty covering manufacturing defects and product failure from the original purchase date. This warranty applies only to new products and is not extended by repairs or replacements. It does not cover cosmetic damage, or damage resulting from accidents, misuse, abuse, negligence, commercial use, or modifications. Accessories like audio cables, power adapters, and perishable items such as ear tips and batteries are excluded.
For support, contact support@simolio.com (US/CA/AU) or support_uk@simolio.com (UK). Visit www.simolio.com or www.amazon.com/simolio.
Technical Specifications
| Parameter | Specification |
|---|---|
| Transmission mode | Automatic Frequency-Hopping Spread Spectrum |
| Carrier frequency | 2.4GHz ISM BAND |
| Power Supply | Transmitter: output: DC 5V, 1A; input: 100~240V Earphone: built-in 350mAh Li-battery |
| Frequency response | 20 Hz – 20 KHz |
| Distortion | ≤1% |
| Signal-to-noise ratio | ≥70dB |
| Range | Up to 100 feet (without obstacles) |
| Working time | approx 7 hours |
| Charging time | 3 hours |
