1. Introduction
The JINSERTA JS-8974 is a versatile 2-in-1 Bluetooth 5.2 audio adapter designed to seamlessly switch between transmitter (TX) and receiver (RX) modes. It allows you to upgrade your wired audio devices to wireless Bluetooth functionality, providing high-fidelity sound quality with support for aptX-HD and aptX-LL codecs for low latency audio. This adapter is ideal for use with TVs, car audio systems, PCs, headphones, and speakers.
Package Contents:
- 1x JINSERTA JS-8974 Bluetooth 5.2 Audio Adapter
- 1x Charging Cable (Type-C)
- 1x User Manual
2. Device Overview
Familiarize yourself with the components and controls of your JS-8974 adapter.
- Mode Switch (TX/RX): Toggles between Transmitter and Receiver modes. Also functions as the power switch.
- Charging Port (DC 5V Type-C): For charging the internal battery.
- 3.5mm AUX Port: For audio input/output.
- Antenna: For enhanced wireless signal transmission and reception.
- Pilot Lamps (RX, TX, A, B): Indicate current mode and connected devices.
- Function Key (A/B): Used for switching between connected devices in dual connection mode.
3. Setup and Charging
3.1 Charging the Device
Before first use, fully charge the adapter. The device features a 500mAh polymer battery, providing up to 20 hours of continuous listening after a 2-hour charge.
- Connect the provided Type-C charging cable to the DC 5V charging port on the adapter.
- Connect the other end of the charging cable to a standard USB power adapter (not included) or a computer USB port.
- The charging indicator light will show the charging status. It will typically turn off or change color once fully charged.
3.2 Powering On/Off and Mode Selection
The mode switch also functions as the power switch.
- To Power On: Slide the switch to either the 'TX' or 'RX' position.
- To Power Off: Slide the switch to the center 'OFF' position.
- To Select Mode: Slide the switch to 'TX' for Transmitter mode or 'RX' for Receiver mode.
4. Operating Instructions
4.1 Transmitter (TX) Mode
In TX mode, the adapter transmits audio from a non-Bluetooth device (e.g., TV, PC) to Bluetooth-enabled headphones or speakers.
- Set the mode switch to 'TX'.
- Connect the adapter's 3.5mm AUX port to the audio output (e.g., headphone jack) of your non-Bluetooth device (TV, PC).
- Place your Bluetooth headphones or speakers into pairing mode.
- The adapter will automatically search for and connect to nearby Bluetooth devices. The 'A' or 'B' pilot lamp will light up when a device is connected.
- Dual Connection: To connect a second Bluetooth device, press the A/B function key. The adapter will search for another device. Once connected, both 'A' and 'B' lamps will be lit, and you can switch between them using the A/B key.
4.2 Receiver (RX) Mode
In RX mode, the adapter receives audio from a Bluetooth-enabled device (e.g., smartphone, tablet) and outputs it to a wired audio device (e.g., wired speakers, car audio, wired headphones).
- Set the mode switch to 'RX'.
- Connect the adapter's 3.5mm AUX port to the audio input of your wired audio device (e.g., AUX-in on speakers, car stereo).
- Enable Bluetooth on your smartphone, tablet, or notebook and search for the adapter (usually appears as "JS-8974" or similar).
- Select the adapter to pair. The 'A' or 'B' pilot lamp will light up upon successful connection.
- Dual Connection: To connect a second Bluetooth source device (e.g., another phone), press the A/B function key. The adapter will allow connection from another source. You can switch between the two connected source devices using the A/B key.
4.3 Dual Device Connection
The JS-8974 supports connecting to two devices simultaneously in both TX and RX modes:
- TX Mode: Transmit audio to two Bluetooth headphones or speakers at the same time.
- RX Mode: Connect two Bluetooth source devices (e.g., two smartphones) and switch between them to play music through your wired audio system.
Use the A/B function key to switch between the two connected devices.
5. Maintenance
To ensure the longevity and optimal performance of your JINSERTA JS-8974 adapter, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the device. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To preserve battery life, avoid fully discharging the device frequently. Charge it regularly, even if not in use for extended periods.
- Handling: Handle the device with care. Avoid dropping it or subjecting it to strong impacts.
6. Troubleshooting
If you encounter issues with your JS-8974 adapter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/Device won't turn on | Low battery; Mode switch in OFF position | Charge the device fully; Ensure switch is in TX or RX position. |
| Cannot pair with a Bluetooth device | Device not in pairing mode; Too far from adapter; Interference | Ensure the target device is in pairing mode; Bring devices closer; Restart both devices. |
| No sound or poor sound quality | Incorrect mode (TX/RX); Loose audio cable connection; Volume too low; Interference | Verify correct TX/RX mode; Check 3.5mm AUX cable connection; Adjust volume on both devices; Reduce obstacles between devices. |
| Short transmission distance | Obstacles; Interference from other wireless devices | Ensure clear line of sight (up to 30m barrier-free); Move away from Wi-Fi routers or other strong signal sources. |
| Dual connection issues | Incorrect switching; Device compatibility | Press the A/B function key to switch between devices; Ensure both devices are compatible with dual connections. |
7. Specifications
| Feature | Specification |
|---|---|
| Product Name | Qualcomm Bluetooth Audio Receiver/Transmitter |
| Model Name | JS-8974 |
| Bluetooth Version | V5.2 |
| Bluetooth Chip | Qualcomm |
| Bluetooth Decoding | SBC/AAC/APTX-HD/APTX-LL |
| Input Power | DC 5V |
| Power Supply Mode | Type-C |
| Battery Capacity | 500mAh |
| Continuous Playback | Up to 20 hours (after 2 hours charge) |
| Product Material | Aluminium Alloy |
| Transmission Distance | Up to 30m (barrier-free) |
| Product Features | Bluetooth Reception / Transmission (2-in-1) |
| Adaptive Interface | AUX 3.5mm port |
| Item Dimensions (L x W x H) | 77mm x 52mm x 16mm |
| Item Weight | 300g |
8. User Tips
- Optimize Range: For the best wireless range (up to 30 meters), ensure there are no major physical obstructions (walls, large furniture) between the adapter and your connected Bluetooth device.
- Audio Quality: To experience the highest audio quality (aptX-HD/LL), ensure both your source device and receiving device also support these codecs.
- Battery Preservation: If storing the adapter for an extended period, charge it to about 50% and store it in a cool, dry place. Recharge every few months to prevent deep discharge.
- Dual Device Management: When using the dual connection feature, remember to use the A/B function key to switch between the active audio stream or connected devices.
9. Warranty and Support
For any product-related inquiries, technical support, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
