Adaptive HD Transmitter: Adaptive chip with Qualcomm Adaptive Low Latency Encoder, minimize audio delay to about 60ms, Bluetooth transmitter provides fully synchronized audio and video. Bluetooth 5.2: Designed using the latest version of Bluetooth 5.2 technology, it has four times the range and twice the speed of previous Bluetooth versions, so your device offers a more stable wireless connection. Input : USB power drive Compatible with 3.5 mm AUX / RCA / Coaxial Digital Audio (COAXIAL) / Optical Digital (SPDIF OPTICAL). OS: /5 OS/Windows/Android If your TV does not support USB audio output, you need to connect the transmitter to a power source via USB and then connect it via RCA/Coaxial Digital Audio (COAXIAL)/Optical Digital (SPDIF OPTICAL). Support for audio decoding: -Adaptive /aptxX LL/ / Colour:black Material:plastic Size: 6.9x3x2cm Package Contents: 1 x Bluetooth Audio Transmitter 1 x USB Cable 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.