Features: This extremely portable and lightweight wireless audio transmitter and receiver is an for ideal wireless audio solution for a wide range of situations and uses. Transmitter mode: wirelessly transmits audio from your non bluetooth-compatible TV, home stereo system or cd player to your bluetooth-compatible headphones or speakers. Receiver Mode: Wirelessly transmits audio from your Bluetooth-enabled phone, tablet or computer to your wired stereo, speakers or headphones. Switch between transmitter and receiver modes with the simple flick of a switch. Effortlessly connect using advanced bluetooth-compatible technology and 3.5mm audio cable (included). Wide compatibility: With the included 3.5mm cable, this transmitter receiver adapter can be widely used in your car, computer, laptop, home stereo system, headphone, smartphone, MP3 player, CD player, etc. Operating range: up to 15m (without blocking objects). Specifications: Name: Bluetooth-compatible audio adapter Bluetooth-compatible version: V5.0 Function: 2-in-1 bluetooth-compatible audio receiver transmitter (receive hands-free calls) Transmission signal distance: 10-15m Fully for Automated Matching One for key mode switch, blue light reception, red light transmission Input interface: 3.5mm Input voltage: for DC /5v No need to drive, connect and for play No internal battery, external power supply Product Size: approx. 4.5x2x1.1cm/1.77x0.79x0.43in Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1PC x Bluetooth-compatible 5.0 audio transmitter/adapter 1PC x 3.5mm aux cable 1PC x user manual