1. luxury design, perfect flight companion: The designer takes into account your daily travel and convenient storage. The appearance adopts a simple mirror design, which is very convenient to adjust the volume. The volume adopts a lighter and smaller design 2.which makes it easy to browse its functions. The interface operation is simple. You can switch seamlessly between the transmission and reception modes with just a simple switch. The button life is long. At the same time, it has functions such as voltage resistance, over-current, short circuit and overheating protection to safety. 3.Low latency and intelligent noise reduction technology: Our Bluetooth audio receiver uses high-performance low-latency chips and newly upgraded Bluetooth 5.4 technology, adopts the latest noise reduction and digital signal processor technology, supports lossless HD decoding, high sampling rate, stable and smooth connection, 4.2-in-1 Bluetooth Transmitter Receiver: Wide Compatibility, In Transmitter (TX) mode, this Bluetooth audio adapter converts your TV/PC/CD player//MP3/MP4 into a Bluetooth transmitter. 5.Dual device connection and pairing, share joy: In TX mode, the Bluetooth transmitter receiver can connect to two stereo Bluetooth speakers or stereo Bluetooth headphones at the same time. Product name: Two-in-one Bluetooth adapter receiver and transmitter Transmission distance: 10 meters without obstacles. Power supply mode: Type-C interface Battery usage: receiving time is 11.5 hours/transmitting time is 10 hours. Colour:black Material:ABS Size:38.1x16.1x59.3mm Package Contents: 1 x adapter 1 x USB charging cable 1 x English instruction manual 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.