BLUETOOTH 5.0 RECEIVERThe latest Bluetooth 5. 0 technology ensures a stable connection between your phone and non-Bluetooth audio player (with 3.5mm AUX port) like car stereo, wired headphones. PAIR 2 DEVICES AT ONCEThe portable Bluetooth receiver can be paired with 2 devices at the same time. You can enjoy your music without worrying about missing a call. Once paired, the car stereo will automatically reconnect to your last paired Bluetooth devices, as long as they are within wireless range. HANDS-FREE CALLSThe J19 Bluetooth audio adapter provides about 10 hours of non-stop wireless music streaming or 10 hours of speakerphone calls while driving, taking care of your driving safety and getting rid of boring long car journeys. PLUG and PLAY AND EASY TO USE One touch power on/off, enlarged volume/track knob to control volume and easily skip track, answer/hang up and play/pause music via the center button WIDELY COMPATIBLE Bluetooth 5.0 receiver compatible with most smartphones, ideal for home or vehicle audio systems. (Such as: speaker, earphone, etc.). Features: 1. Bluetooth 5.0+EDR 2. Bluetooth transmission distance 10m 3. Support Bluetooth hands-free calling function 4. Support A2DP Bluetooth stereo 5. Support answering, hanging up, rejecting, redialing and other phone functions 6. Support echo cancellation and noise suppression (CVC) technology during calls 7. After disconnecting the Bluetooth connection for 5 minutes, the product will automatically shut down. Packing accessories: 1. 1 x Bluetooth music receiver host 2. 1 x USB charging cable 3. 1 x 3.5mm audio adapter 4. 1 x English product manual Battery capacity: 150mAh Color: Black Number of pieces delivered: 1 piece becomeveryrich