1.Lightweight 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 ensure safety. 3.Low latency and intelligent noise reduction technology: Our Bluetooth audio receiver uses high-performance low-latency chips and ly upgraded Bluetooth 5.4 technology, adopts the latest noise reduction and digital signal processor technology, supports SBC 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/iPod/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