1. Introduction and Overview
This manual provides detailed instructions for the Lerkely Bluetooth 5.0 Transmitter Receiver Adapter. This versatile 2-in-1 device allows you to wirelessly transmit audio from non-Bluetooth devices (like TVs, PCs, MP3 players) to Bluetooth headphones or speakers, or receive Bluetooth audio from your phone/tablet to wired speakers or car stereos. It features a stable Bluetooth 5.0 connection and low latency for high-fidelity audio.
Image 1.1: Lerkely Bluetooth 5.0 Transmitter Receiver Adapter with 3.5mm audio cable and USB charging cable.
2. Key Features
- 2-in-1 Design: Combines Bluetooth audio transmitter (TX) and receiver (RX) functions with a 3.5mm auxiliary connector.
- Advanced Bluetooth 5.0: Imported Bluetooth 5.0 chipset ensures a more stable connection and a wireless range of over 33 feet.
- Wide Compatibility: Easily pairs with 99.9% of Bluetooth devices.
- Low Latency: Supports low latency for high-fidelity stereo sound, ensuring delay-free content transmission in transmitter mode.
- Extended Battery Life: Up to 8 hours of continuous playback as a receiver and up to 6 hours as a transmitter.
- Plug and Play: Convenient mode switching via function buttons. Compact, lightweight, and portable design.
Image 2.1: Diagram illustrating the 2-in-1 functionality of the Bluetooth adapter in both Transmitter (TX) and Receiver (RX) modes.
3. Package Contents
Please check the package for the following items:
- 1 x Lerkely Bluetooth Device (Transmitter/Receiver)
- 1 x Product Specifications (User Manual)
- 1 x USB Charging Cable
- 1 x 3.5mm Audio Cable
Image 3.1: Detailed view of the device showing the multi-function button, LED indicator, Micro USB charging port, 3.5mm audio port, TX/RX switch, and included cables.
4. Specifications
| Feature | Specification |
|---|---|
| Bluetooth Version | 5.0 |
| Bluetooth Protocol Support | A2DP, AVRCP |
| Multi-format Decoding Support | MP3, WAV, WMA, APE, FLAC |
| Transmission Distance | > 20m (open area) |
| Charging Input Voltage | DC 5V |
| Power Supply | 3.7V (Li-Polymer Battery) |
| Operating Time | > 10 hours (Receiver Mode), ~6 hours (Transmitter Mode) |
| Charging Time | 2 hours |
| Signal-to-Noise Ratio | > 95dB |
| Input/Output Connection | 3.5mm Stereo Headphone Jack |
| Dimensions | 8.2 x 6.9 x 2.3 cm |
| Weight | 40 g |
Image 4.1: The device highlighting its excellent battery life of up to 8 hours and a charging time of 2 hours.
5. Setup and Operation
5.1. Power On/Off
- To Power On: Press and hold the multi-function button for 2 seconds. The red LED light will flash.
- To Power Off: Press and hold the multi-function button for 2 seconds.
5.2. Transmitter Mode (TX) Setup
Use this mode to transmit audio from non-Bluetooth devices to Bluetooth headphones or speakers.
- Ensure the device is switched to TX mode (check the TX/RX switch).
- Insert the 3.5mm audio cable into the device's TX mode port.
- Connect the other end of the 3.5mm audio cable to the audio output jack of your source device (e.g., PC, TV, iPod, MP3/MP4 player, CD player).
- Turn on your Bluetooth speakers or Bluetooth headphones and set them to pairing mode.
- The Lerkely adapter will automatically search for and pair with your Bluetooth audio device. Once successfully paired, the red LED light will remain solid.
5.3. Receiver Mode (RX) Setup
Use this mode to receive Bluetooth audio from your phone or tablet and play it through wired speakers or car stereos.
- Ensure the device is switched to RX mode (check the TX/RX switch).
- Insert the 3.5mm audio cable into the device's RX mode port.
- Connect the other end of the 3.5mm audio cable to the audio input jack of your wired audio system (e.g., car stereo, home sound system, wired headphones). The blue LED light on the adapter will flash.
- On your phone or tablet, enable Bluetooth and search for available devices.
- Select "YPF-3" from the list of found devices to pair.
- Once successfully paired, the blue LED light will remain solid. You can now play audio from your phone/tablet through your wired system.
Image 5.1: The device in Receiver (RX) mode, allowing wireless music streaming from a smartphone to wired headphones.
Image 5.2: Examples of the device's versatility, connecting a phone to a speaker (RX mode) and a TV to Bluetooth headphones (TX mode).
5.4. Charging
To charge the device, connect the provided USB charging cable to the Micro USB charging port on the adapter and the other end to a 5V DC power source (e.g., USB wall adapter, computer USB port). The charging time is approximately 2 hours.
5.5. Wide Compatibility
The Lerkely Bluetooth adapter is designed for broad compatibility with various audio devices, enabling wireless audio for many setups.
Image 5.3: The device's wide compatibility with various audio sources and output devices, including TVs, PCs, game consoles, and home stereos.
6. Safety Warnings
Caution: Keep the battery away from excessive heat and humidity. Turn off the device when not in use to prevent damage and prolong battery life.
7. Troubleshooting
- Device not powering on: Ensure the device is fully charged. Connect it to a power source using the USB charging cable.
- Cannot pair with a Bluetooth device:
- Ensure the adapter is in the correct mode (TX for transmitting, RX for receiving).
- Make sure the target Bluetooth device (headphones/speakers/phone) is in pairing mode.
- Move the adapter closer to the target device.
- Turn off and on both the adapter and the target device, then try pairing again.
- No audio output/input:
- Check if the 3.5mm audio cable is securely connected to both the adapter and the audio source/output device.
- Verify the volume levels on both the adapter and the connected audio device.
- Ensure the correct audio input/output is selected on your source/output device.
- Audio quality issues (e.g., static, drops):
- Reduce the distance between the adapter and the connected Bluetooth device.
- Avoid obstacles (walls, large metal objects) that may interfere with the Bluetooth signal.
- Minimize interference from other wireless devices (Wi-Fi routers, microwaves).
8. Warranty and Support
Lerkely products are designed for reliability and performance. For any issues or questions regarding your Lerkely Bluetooth 5.0 Transmitter Receiver Adapter, please refer to the contact information provided with your purchase or visit the official Lerkely support website. Please retain your proof of purchase for warranty claims.
