1. Qualcomm QCCV5.2 enhanced version: Bluetooth transceiver adaptive Adaptive 2. Support lossless transmission: multiple encodings and A2DP, AVRCP, HFP, high-standard audio decoding, no noise 3. Upgrade to Bluetooth audio: support audio equipment with 3.5 mm aux interface, and play sound wirelessly through Bluetooth 4. Upgrade Bluetooth TV: connect to TV with 3.5mm interface to transmit Bluetooth signal to connect to Bluetooth headset, Bluetooth speaker Interface: 3.5mm/aux Whether plug and play: plug and play External power supply: with external power supply Transmission rate: 100 (Mbps) Effective working radius: 10 (m) Bluetooth standard: 5.2 Working frequency: 2.4 (MHz) Colour:black Material:plastic Size:8 x 16.1 x 2.6cm Package Contents: 1 x transmitter receiver 1 x audio cable 1 x charging cable 1 x Chinese and English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.