Plug and play support USB disk playback,Compatible with all of ≤128GB USB flash drives, plug and play, high-fidelity stereo, supports MP3, WAV, WMA, FLAC and other audio formats. Built-in microphone for one-touch hands-free calling,Adopt intelligent noise reduction technology to effectively filter out background noise, no need to hold the phone close to you Achieve high-quality voice calls, allowing you to maintain clear and smooth communication. High signal coverage of about 20 meters stable mission,Achieve barrier-free long-distance mission of about 10-20 meters, suitable for a variety of indoor and outdoor scenarios, stable signal and continuous connection. Infrared remote control controls your life with one click,The fast and convenient operation experience allows you to easily realize functions wirelessly. Just can switch the previous and next songs/adjust the volume and other functions. Upgrade to one-to-two, you can connect two mobile phones to listen to music at the same time and switch freely. Product name:wireless audio receiver Support devices:Mobile phone/tablet/speaker/amplifier, etc. Power supply method:Automatically starts up after power-on Usage:Driver-free, plug and play Product interface:/AUX/Type-C/USB signal-to-noise ratio: 90dB mission distance:≈10-20 meters (in an obstacle-free environment) Basic functions:Receive/call/charge Bluetooth protocol:A2DP/AVRCP/HFP/ U disk format:MP3/FLAC/WAV/WMA (The product appearance and printed words depending on the batch, but this does not affect use) Color: As shown Material: plastic Package Contents: 1 x wireless audio receiver 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.