Function Introduction: 1. This portable and wireless audio transmitter and receiver is the perfect wireless audio Bluetooth transmission solution for a of situations and uses. 2. Transmitter mode: wirelessly transmit audio from a non-Bluetooth enabled TV, home stereo system or CD player to Bluetooth headphones or speakers. 3. Receiver Mode: Wirelessly transmits audio from Bluetooth-enabled cell phones, tablets, or computers to a wired stereo, speakers, or headphones. 4. This product is compatible with most Bluetooth on the market, with low output delay and stable performance. Widely used in computers or laptops or tablets or home stereo systems or headphones or smartphones or MP3 players and CD players size: 3.2 x 1.7 x 1CM Material: plastic colour: black Package Contents: 1 x bluetooth transmitter 1 x Audio 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.