1. Product Overview
The UGREEN Bluetooth 5.3 Receiver Adapter is designed to transform wired audio systems into wireless ones, enabling seamless audio streaming and hands-free calling. It features advanced Bluetooth 5.3 technology for stable connections and a built-in microphone for clear communication. This device is ideal for use in vehicles or with home audio systems.
Figure 1: UGREEN Bluetooth 5.3 Receiver Adapter
Video 1: Product demonstration of the UGREEN Bluetooth 5.3 Receiver Adapter.
2. Package Contents
Please check the package for the following items:
- 1 x 3.5mm Metal Audio Adapter
- 1 x Bluetooth Receiver
- 1 x Type-C Charging Cable
- 1 x 3.5mm Audio Cable
Figure 2: Package Contents
3. Setup Instructions
3.1 Charging the Device
Before first use, fully charge the Bluetooth Receiver using the provided Type-C charging cable. Connect the Type-C end to the receiver's charging port and the USB-A end to a compatible power source (e.g., car charger, wall adapter, computer USB port).
- Charging Time: Approximately 2 hours
- Battery Capacity: 300mAh
- Note: Not compatible with PD protocol adapter power supply.
Figure 3: Battery Life and Charging Information
3.2 Connecting to an Audio System
The receiver can be connected to any audio system with a 3.5mm AUX input, such as car audio systems, home speakers, headphones, or amplifiers.
- Insert the 3.5mm Metal Audio Adapter directly into the 3.5mm port of the Bluetooth Receiver.
- Plug the other end of the 3.5mm adapter (or the provided 3.5mm audio cable) into the AUX input of your desired audio system.
Figure 4: Connecting to a Speaker
Figure 5: Wide Compatibility Overview
3.3 Pairing with Bluetooth Devices
- Power On: Press and hold the Multi-Function Button (MFB) for 3 seconds until the indicator light flashes, indicating pairing mode.
- Enable Bluetooth: On your mobile device (phone, tablet, etc.), enable Bluetooth and search for available devices.
- Select Device: Look for "UGREEN-90748" in the list of available devices and select it to pair.
- Confirmation: Once paired, the indicator light on the receiver will change, and your device will show a connected status.
Figure 6: Bluetooth Pairing Confirmation
4. Operating Instructions
4.1 Basic Functions
- Power On/Off: Press and hold the MFB for 3 seconds.
- Play/Pause Music: Short press the MFB.
- Answer Call: Short press the MFB during an incoming call.
- Reject Call: Double-click the MFB during an incoming call.
- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
Figure 7: Simple Key Operation
4.2 Dual Device Connection
The receiver supports connecting two Bluetooth devices simultaneously, allowing for navigation and music playback at the same time.
Figure 8: Connect 2 Devices at One Time
4.3 Hands-Free Calling
With a built-in noise-cancellation microphone, the receiver provides clearer calls for safer driving.
Figure 9: Hands-free Calling with Noise Cancellation
4.4 Smart Memory Reconnection
The receiver will automatically connect to the last paired Bluetooth device when it enters pairing mode, simplifying the connection process.
5. Maintenance
- Keep the device dry. Avoid exposure to moisture or liquids.
- Clean the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Store the device in a cool, dry place when not in use.
- Avoid exposing the battery to extreme temperatures, as this can reduce its lifespan.
- Do not attempt to disassemble or modify the device, as this will void the warranty and may cause damage.
6. Troubleshooting
- Device won't power on: Ensure the device is fully charged.
- Cannot pair with Bluetooth device:
- Make sure the receiver is in pairing mode (indicator light flashing).
- Ensure Bluetooth is enabled on your mobile device.
- Move your mobile device closer to the receiver.
- Check if the receiver is already connected to another device.
- For iPhone and Samsung devices, manual reconnection may be required after initial pairing.
- Poor audio quality or disconnections:
- Ensure the receiver is within the 15m (49ft) transmission range without significant obstructions.
- Minimize interference from other wireless devices.
- Check the connection of the 3.5mm audio cable to both the receiver and the audio system.
- Battery not charging:
- Verify the Type-C charging cable is securely connected.
- Try a different USB power source.
- Ensure the power source is not a PD protocol adapter.
- Resetting the device: If experiencing persistent issues, locate the reset button (often a small pinhole) and use a thin object (like a paperclip) to press it. This will restore factory settings.
7. Specifications
| Feature | Specification |
|---|---|
| Brand Name | UGREEN |
| Model Number | CM596 (90748) |
| Material | PC+ABS |
| Bluetooth Version | 5.3 |
| Bluetooth Delay | <250ms |
| Bluetooth Protocol | AVRCP/A2DP/HFP/HSP |
| Input | 3.5mm Audio |
| Charging Port | USB-C |
| Frequency Range | 2400MHz-2483.5MHz |
| Frequency Response | 20Hz-20kHz |
| Output Power | >5mW |
| SNR | >90dB |
| Codecs | SBC/AAC |
| Battery Capacity | 300mAh 3.7V (1.11Wh) |
| Charging Limited Voltage | 5.25V |
| Charging Time | About 2 Hours |
| Runtime | About 15 Hours |
| Transmission Distance | 15m/49ft (No Blocking) |
| Package | UGREEN Retail Box |
Figure 10: Detailed Product Parameters
8. User Tips
- For optimal audio quality, ensure the receiver is placed in a location with minimal physical obstructions between it and your paired device.
- To maximize battery life, fully charge the device before long trips or extended use.
- When using in a car, consider mounting your phone in a visible location for navigation while keeping the receiver connected for audio.
9. Warranty and Support
UGREEN products come with a manufacturer's warranty. For warranty claims, technical support, or further assistance, please refer to the contact information provided with your purchase or visit the official UGREEN website.
