1X(1. Auto-On: pe for use in a car or other situations where you want it to have an auto-on function when you it to a source.< />2. Dual Device Link: Pair your smartphone and tablet at the same time and stream music from any stereo system that suppor standa 3.5mm or RCA jacks. two Bluetooth devices at once to listen to music, make calls, and more.< />3. two devices: Support to 3.5mm o port and 2 RCA o por at the same time.< />4. Hands-free calling and navigation oadcast: Built-in microphone for hands-free calling; a simple button to answer/redial/hang up/r calls. In addition, the Bluetooth car adapter suppor oadcasting voice notifications from existing navigation apps, so you don't have to look down at your phone to safe driving.< />5. Wireless Music Streaming: Stream music in stereo to non-Bluetooth headphones and speakers.< />< />Space-saving : Ultra-compact and , it is convenient to use with various devices.< />Super stable connion: Our bluetooth o adapter is equipped with bluetooth 5.2 chip for stable pai, fast transmission and wide signal range (10m/33 ft). With 3.5mm AUX port and 2 RCA por, it can non-Bluetooth car o system, home o, wired headphones/speakers, amplifier/home theater, etc. Then you can enjoy wireless Hi-Fi music streaming! Note: It's just a bluetooth recei, not a transmitter. So you can't use it for your TV, keyboa, mouse.< />Auto : When you turn it , this bluetooth recei will auatically to the last paired bluetooth device.< />3 keys: track/volume up, previous track/volume down, multi-function key ()< />Bluetooth protocol: AVRCP, A2DP< />Frequency range: 2400-2483.5MHz< />Frequency Response: 20Hz-20kHz< />Output : 28mW RL=16ohm< />Signal-to-noise ratio:)