1. Introduction
This manual provides detailed instructions for the Sungale Bluetooth 5.2 Transmitter & Receiver, Model BT18. This versatile device functions as both a Bluetooth audio transmitter (TX) and receiver (RX), enabling wireless audio connectivity for a wide range of devices. It supports Bluetooth 5.2 for stable connections, AAC/SBC codecs for high-quality audio, hands-free calling, and simultaneous connection to two devices in TX mode.
Image 1.1: The Sungale Bluetooth 5.2 Transmitter & Receiver, a compact black device with a 3.5mm audio jack, control buttons, and a mode switch.
2. Product Overview
2.1 Key Features
- Bluetooth 5.2 Technology: Provides a stable and efficient wireless connection.
- 2-in-1 Functionality: Operates as both a Bluetooth Transmitter (TX) and Receiver (RX).
- High-Quality Audio: Supports SBC and AAC audio codecs.
- Dual Device Connection (TX Mode): Connects to two Bluetooth headphones or speakers simultaneously.
- Hands-Free Calling: Integrated microphone for convenient phone calls.
- Compact Design: Ultra-small and portable for various applications.
- Usable While Charging: Allows continuous operation even when charging.
- Long Battery Life: Up to 12 hours of continuous playback.
- Communication Range: Up to 10 meters (33 feet).
2.2 Package Contents
- Sungale Bluetooth 5.2 Transmitter & Receiver (BT18)
- USB Charging Cable
- 3.5mm Audio Cable
- User Manual (this document)
2.3 Device Layout
Image 2.1: Overview of the device's TX (Transmitter) and RX (Receiver) modes, illustrating connections to headphones, speakers, laptops, TVs, amplifiers, and car audio systems.
- 3.5mm Audio Jack: For connecting to audio sources or output devices.
- Multi-function Button (Play/Pause): Controls playback and call functions.
- Volume Up (+) / Next Track: Increases volume or skips to the next track.
- Volume Down (-) / Previous Track: Decreases volume or goes to the previous track.
- TX/RX Mode Switch: Toggles between Transmitter and Receiver modes.
- LED Indicator: Displays device status (pairing, connected, charging).
- Microphone: For hands-free calling.
- USB Charging Port: For charging the device.
3. Setup
3.1 Charging the Device
Before first use, fully charge the device using the provided USB charging cable. Connect the USB cable to the device's charging port and a standard USB power adapter (not included). The LED indicator will show charging status and turn off or change color when fully charged. The device can be used while charging.
3.2 Mode Selection
Use the TX/RX switch on the side of the device to select the desired operating mode:
- TX (Transmitter) Mode: To send audio wirelessly from a non-Bluetooth device (e.g., TV, PC) to Bluetooth headphones or speakers.
- RX (Receiver) Mode: To receive audio wirelessly from a Bluetooth device (e.g., smartphone, tablet) and play it through a non-Bluetooth audio system (e.g., car stereo, wired speakers).
3.3 Pairing in RX (Receiver) Mode
Follow these steps to connect the device as a receiver:
- Switch the device to RX mode.
- Insert the 3.5mm audio jack into the auxiliary input of your non-Bluetooth audio system (e.g., car stereo, wired speaker).
- Press and hold the multi-function button for approximately 3 seconds until the LED indicator flashes, indicating pairing mode.
- On your Bluetooth-enabled device (e.g., smartphone), enable Bluetooth, search for available devices, and select "BT-18" to connect.
- Once connected, the LED indicator will stop flashing and remain solid.
Image 3.1: Visual guide demonstrating the pairing process for both RX (Receiver) and TX (Transmitter) modes, showing button presses and device recognition.
3.4 Pairing in TX (Transmitter) Mode
Follow these steps to connect the device as a transmitter:
- Switch the device to TX mode.
- Insert the 3.5mm audio jack into the audio output port of your non-Bluetooth audio source (e.g., TV, computer, MP3 player).
- Press and hold the multi-function button for approximately 3 seconds until the LED indicator flashes, indicating pairing mode.
- Put your Bluetooth receiving device (e.g., headphones, speaker) into its pairing mode.
- The Sungale BT18 will automatically search for and connect to your Bluetooth receiving device. Once connected, the LED indicator will stop flashing and remain solid.
Image 3.2: The Sungale BT18 connected to a traditional speaker, enabling wireless audio transmission from an audio source to the speaker.
4. Operating Instructions
4.1 Basic Audio Control
- Play/Pause: Press the multi-function button once.
- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
- Next Track: Press and hold the '+' button.
- Previous Track: Press and hold the '-' button.
4.2 Hands-Free Calling (RX Mode Only)
When the device is in RX mode and connected to your smartphone:
- Answer Call: Press the multi-function button once.
- End Call: Press the multi-function button once during a call.
- Reject Call: Press and hold the multi-function button for 2 seconds.
- Redial Last Number: Double-press the multi-function button.
Image 4.1: The Sungale BT18 connected in a car, facilitating hands-free phone calls for safe driving.
4.3 Dual Pairing (TX Mode Only)
In TX mode, the device can transmit audio to two Bluetooth headphones or speakers simultaneously. After successfully pairing with the first device, put the second Bluetooth device into pairing mode and then briefly press the multi-function button on the Sungale BT18 to initiate connection with the second device.
Image 4.2: Illustrates the dual pairing feature, allowing two individuals to enjoy audio from a single source (e.g., TV) using separate Bluetooth headphones.
5. Maintenance
To ensure the longevity and optimal performance of your Sungale Bluetooth 5.2 Transmitter & Receiver, please follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the device. Avoid using harsh chemicals, solvents, or abrasive cleaners.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid Moisture: Do not expose the device to water or excessive humidity.
- Handle with Care: Avoid dropping the device or subjecting it to strong impacts.
- Charging: Use only the provided charging cable or a certified equivalent.
6. Troubleshooting
If you encounter issues with your device, refer to the following troubleshooting tips:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery. | Charge the device fully. |
| Cannot pair with a Bluetooth device. | Incorrect mode selected; device not in pairing mode; receiving device too far or not in pairing mode. | Ensure correct TX/RX mode. Press and hold multi-function button for 3 seconds to enter pairing mode. Ensure receiving device is in pairing mode and within 10m range. |
| No sound or poor sound quality. | Incorrect cable connection; volume too low; interference; incompatible codec. | Check 3.5mm cable connection. Adjust volume on both devices. Move away from sources of interference. Ensure devices support SBC/AAC. |
| Audio delay/latency. | Bluetooth technology inherent latency; codec limitations. | While Bluetooth 5.2 reduces latency, some delay may still occur, especially with certain codecs or older receiving devices. This is often an inherent characteristic of wireless audio transmission. |
| Battery life is shorter than expected. | High volume usage; frequent pairing/disconnection; aging battery. | Reduce volume. Ensure full charge before use. Battery performance may degrade over time. |
| Cable is too short for my setup. | Standard cable length. | Consider purchasing a longer 3.5mm audio extension cable if needed for your specific setup. |
7. Specifications
| Feature | Detail |
|---|---|
| Model | BT18 |
| Brand | Sungale |
| Color | Black |
| Bluetooth Version | 5.2 |
| Audio Codecs | SBC, AAC |
| Operating Modes | Transmitter (TX), Receiver (RX) |
| Special Features | Hands-free calling, Rechargeable, Dual device connection (TX mode) |
| Connection Method | Bluetooth, 3.5mm Audio Jack |
| Continuous Playback Time | Up to 12 hours |
| Communication Range | Up to 10 meters (33 feet) |
| Input Voltage | 12 V |
| Rated Current | 2.1 A |
| Wattage | 10 W |
| Dimensions (Package) | 11.3 x 6.1 x 1.9 cm |
| Weight (Package) | 20 g |
| Material | Rubber (for certain components) |
8. Warranty Information
Specific warranty details for the Sungale Bluetooth 5.2 Transmitter & Receiver (Model BT18) may vary depending on your region and point of purchase. Please retain your proof of purchase for any warranty claims. For detailed warranty terms and conditions, refer to the documentation provided with your product or contact the retailer from whom you purchased the device.
9. Support
For further assistance, technical support, or inquiries regarding your Sungale Bluetooth 5.2 Transmitter & Receiver, please refer to the following:
- Manufacturer's Website: Visit the official Sungale website for product information, FAQs, and support resources.
- Retailer Support: Contact the customer service department of the retailer where you purchased the product.
- Online Resources: Search for community forums or online guides related to Bluetooth audio transmitters/receivers for general troubleshooting tips.
