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/laptops/tablets/home stereo systems/headphones/smartphones/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.