Strong signal 10m stable transmission Built-in signal gain amplifier, no dead angle in room connection 10m transmission sound quality without delay, stable signal without lag Bluetooth 5.3 Let music from the core Smart Bluetooth chip, equipped with the version of Bluetooth 5.3, more stable transmission, stronger signal, no pressure on Bluetooth transmission/reception Support TF card playback Driver-free plug and play Support TF card playback, no transmission delay Rich interfaces Diverse gameplay Multiple interface options to meet the needs of devices Button operation Simple and convenient Equipped with multi-function keys to reduce tedious operations Support play/pause/song switching/volume/mode switching and other functions Bluetooth: Bluetooth 5.3 Power supply: DC5V/1A Frequency: 2.4GHz-2.48GHz Power supply voltage: DC 5V (no built-in battery) Bluetooth receiving function: connect 2 mobile phones Bluetooth transmitting function: connect 2 pairs of Bluetooth headphones Transmitter, receiver supports reading TF card for playback Screen display: can display 8 device names to be paired (transmitter)/can display paired mobile phone name (receiver) Function: optical fiber input/coaxial input/AUX input/output TF card playback Colour:Black Material:ABS Package Contents: 1 x Bluetooth Adapter 1 x 3.5mm Audio Cable 1 x Coaxial Audio Cable 1 x Fiber Optic Cable 1 Cable 1 x Chinese and English instruction 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.