Features: Bluetooth-compatible5.0 chip for steady pairing, fast transmission and smultaneously pair your smartphone and tablet- and stream music from either one with any stereo system that supports a standard 3.5mm or RCA jack. Support to connect with 3.5mm audio port and 2 RCA audio port at the same time-. Hands-free Calling- & Navigation Broadcast: A built-in microphone for hands-free calls; One simple button to answer/redial/hang up/reject calls.the Bluetooth-compatible car adapter supports broadcasting voice notification from existed navigation apps-, you do not need to look down the phone to ensure safe driving. Wireless Music Streaming: Stereo stream music to non-Bluetooth headphones and speakers-. With the 3.5mm AUX port and 2 RCA port, it can be connected- to non-Bluetooth car audio system, home stereo, wired headphone/speaker, Amplifier/Home Theater.etc. Specifications: Product model:B21 Bluetooth-compatible Version: BT5.0 Output interface: 3.5mm AUX stereo/RCA left and right channels Function description: U-disk, hands-free call, NFC connection,Bluetooth-compatible connection. Bluetooth-compatible protocol: AVRCP, A2DP Frequency range: 2400-2483.5MHz Frequency response: 20Hz-20kHz Signal-to-noise ratio: 90dB Forward transmission distance: approx 10m/32.8ft Product size approx 78x48x18mm/3.07x1.89x0.71in Support Multiple Audio Output Ports: Can Connect With 3.5mm Headset, Stereo System, Speaker System Support: All Bluetooth-compatible audio device; NF-C Available Device. Package Includes: 1x Bluetooth-compatible5.0 Audio Receiver Adapter 1x 3.5mm Aux Cable 1x RCA Audio Cable 1x User Manual 1x TypeC Charge Cable note: 1. Due to manual measurement, please allow 1-3cm error. Make sure you do not mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.