1.It Can be used in almost all digital products with audio input / output (3.5mm Stereo Jack for Home and Car Audio System),just need to connect the audio output / input port. USB Bluetooth adapter can provide wireless connections between your Phone and TV,PC,Home stereo system,and other devices 2.2 in 1 Wireless Adapter, and compact,easy carrying and space saving. Suitable for computer,TV,projector (transmit mode) / speaker,earphone (receive mode) 3.When the light is blue,it indicates the transmitter mode. When the light is red,it indicates the Receiver mode 4.Low latency for high-fidelity stereo sound,lag-free content streaming in transmitter mode. Wireless Bluetooth adapter allows you to enjoy 5.HiFi stereo music without wire restriction,providing you a more convenient and perfect experience advanced Bluetooth 5.0 technology,offer Long-range wireless range up to 10 meters (33 feet),provide more stable and faster signal Product name:2 in1 Bluetooth Transmitter Receiver Adapter Bluetooth Version:Bluetooth5.0+ Supply Voltage:DC/5V Input Interface:3.5MM +USB Output Interface:3 5MM Distance:10 meters Transmitter Range:Computer /TV /Projector /MP3 Receiver Range:Ordinary speaker/ car Product weight:about 8g colour:Black Material:ABS size:42 x 25 x 11mm Package Contents: 2 x Bluetooth 5.0 Audio Transmitter/Receiver Adapter 2 x 3.5mm Aux 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.