2-in-1 Bluetooth Adapter APTX Audio Decoding Audio Bluetooth Receiver Transmitter Features: Using Bluetooth 5.3 chip, low power consumption and high performance, it effectively improves connection stability and effective transmission distance. Supports multi-device connection, two devices can be connected and played at the same time. wired speakers into wireless speakers. Whether it is home audio or car audio, it can be directly converted into wired audio. Lossless decoding technology truly restores audio and automatically adapts to multiple audio sending and receiving formats. Transmitting audio format: /APTX/APTXLL/APTXHD/APTX Adaptive, receiving audio format: /AAC/APTX/aptx HD/aptx Adaptive. With the support of Bluetooth 5.3 chip, the effective connection range of Bluetooth is increased to 20m Product Description: parameter: Bluetooth version: 5.3 Bluetooth protocol: A2DP HFP HSP Frequency range:2.402GHz-2.480GHz Frequency response:100Hz-20kHz Transmission distance: 20 meters Number of connected devices: 2 Signal-to-noise :>90dB Transmitting interface: USB/TX3.5mm interface Receiving interface: RX3.5mm interface Transmit audio format: /APTX/APTXLL/APTXHD/APTX Adaptive Receive audio format: /AAC/APTX/aptx HD/aptx Adaptive USB driver-free support system: WIN-ALL/Linux/ Computer/-5/Android 1: mode takes priority 1. When the USB power supply TX indicator light is on, the device will automatically enter the pairing search state. Turn on the Bluetooth device such as a Bluetooth headset/speaker and enter the pairing mode. The device will automatically search for a successful connection. The A indicator light of the device will stay on, indicating that the first device link is successful. . Note: The slow flashing of the power-on light indicates the reconnection state. To prepare for a new connection, you need to press the button to enter the fast flashing state. 2. Double-click the button again, and the device will initiate a pairing search and enter the search for the second device. the connection is successful, the B indicator light of the device lights up, indicating that the second device is successfully linked. 3. Connect the TYPE- cable to the adapter for power supply, and insert the 3.5mm audio cable. The device will automatically recognize the 3.5mm audio input, and the device work indicator light will be on. 4. Connect the TYPE- cable to the PC and recognize USB/Audio. The device working indicator light flashes slowly, (indicating USB sound card) USB/Audio device: BLS-B55. 2: Receiving mode 1. Plug the USB powered product into the audio cable, the device will automatically recognize the 3.5mm audio output, the indicator light will light up, and the device will automatically enter the pairing search state. Turn on the Bluetooth of your mobile phone/tablet/computer and other devices to search for the product name "BLS-B55" Click Connect Bluetooth, the device is successfully connected, and the A indicator light of the device lights up, indicating that the first device is successfully linked.