Parameter: Product Name: Multi function Bluetooth adapter Product Model: T38 Bluetooth Version: Bluetooth V5.0 Battery: Do not bulit-in battery (Powered by usb charging) Transmission Range: 10m (barrier free) Interface: 3.5mm AUX/COAXIAL/OPTICAL/RCA Support Protocol: A2DP/AVRCP/EDR/HSP Using Method: Drive free Basic Functions: Bluetooth receiver, Bluetooth transmitter, touch screen key operation, digital fiber / coaxial /3.5mm input, led display. Support Devices: All kinds of car, speakers,desktop computer, laptop, TV, power amplifier,projector etc. Colour: black Material: plastic Package Contents: 1 x Wireless Adapter 1 x 3.5mm AUX Audio Cable 1 x Optical Fiber Cable Cable 1 x Type c Charging Cable 1 x RCA audio cable 1 x English Manual Only the above package content, other products are not included. Note: Light shooting 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.