Qualcomm QCC V5.3 enhanced version of Bluetooth transceiver Supports lossless transmission of APTX multiple encodings and A2DP, AVRCP, HFP, HSP high-standard audio decoding without noise Can be connected to audio/power amplifier/TV/headphones, supports 2 devices to be connected to wired devices at the same time (Note: You can only choose one of the two to receive/transmit signals, and cannot use them at the same time) Supports audio equipment with 3.5mm audio cable and AUX interface, and plays sound wirelessly through Bluetooth Connect the Bluetooth receiver to the car AUX interface and listen to music via Bluetooth connection Connect to the 3.5mm interface of the TV to emit Bluetooth signals, and can be connected to Bluetooth headsets and Bluetooth speakers Specification: Bluetooth version: QCC 5.3 Transmission range: 10 meters Input/output: AUX audio interface Frequency response: 100Hz-20kHz Number of connections: 2 Bluetooth protocol: A2DPP\AVRCP Battery capacity: 200mAh Charging voltage: DC 5V Working hours: RX: about 10 hours, TX: about 8 hours Charging time: about 2 hours Size: 66.5*71*24mm