The product features an elegant design and the latest Bluetooth 5.2 technology. It is equipped with a high-end Qualcomm QCC3040 Bluetooth chip and features A and B buttons for independent control of connected devices. Includes a separate audio indicator light to identify the audio transmission mode and supports dual connection (TX) functionality. Equipped with a USB Type-C charging port for convenient charging and a 3.5mm audio input/output interface for wide compatibility. Built-in rechargeable battery ensures long usage time. The device is easy to connect, with no need for additional drivers or app downloads. Bluetooth Version: Bluetooth V5.2 Device Chipset: Qualcomm QCC3040 Supported Protocols: A2DP, AVRCP, TX: A2DP Operating Frequency Band: 2.402GHz - 2.480GHz Bluetooth Class: Class II Signal to Noise Ratio: ≥ 99.3dB Distortion: ≤ 0.1% Supports Dual Connection (TX Mode) Supports Multipoint Connection Operating Current: Less than 22mA Battery Capacity: 250mAh Charging Current: Approximately 200mA Charging Time: About 2 hours Battery Life: Greater than 20 hours (up to 12 hours in TX mode) Bluetooth Range: Greater than 10 meters (in open space) Charging Method: USB Type-C 5V/0.5A Input/Output Connection: 3.5mm audio interface Plug and play – no driver or app installation required. Codec in TX Mode: Adaptive, aptX HD, aptX Low Latency, SBC Use to connect TV, computer, or set-top box to two Bluetooth devices such as speakers or headphones. Codec in Standard Mode: Adaptive, aptX HD, SBC, AAC Connect mobile phone, tablet, or computer (two devices simultaneously) to regular speakers or amplifiers. Color: Black Material: ABS Package Contents: 1 x Wireless Audio Adapter 1 x English Manual Note: Light reflection and differences in display screens may cause slight variations in color compared to the actual product. Measurement allows for a 1-3cm error.