Feature:1. Double output interface, 3.5+2RCA double audio output port, suitable for more devices.2. Double ports playback, memory card and USB port, can support USB flash disk mobile hard disk.3. 3.5mm for AV audio output interface, broader compatibility.4. Using charger cable to connect car/other power source. After starting car or its power source, will automatic turn on and automatic connect to last connected device, when the car shuts down, shuts down automatic.5. Support NFC near field pairing, NFC automatic turn on or off bluetooth wireless connection when pairing.Specification:Condition: 100% Brand NewItem Type: Music ReceiverModel: B20Material: ABSColor: As Pictures ShownSupport EquipmentSupport Two Mobile Phone ConnectionBluetooth Version5.0Output Interface3.5mm Stereo for RCA Left Right Sound ChannelFunction Introduction: Storage Card, USB Flash Disk, Hands Free Call, NFC ConnectionBluetooth ProtocolAVRCPA2DPFrequency Range2400-2483.5MHzFrequency Response20Hz-20kHzOutput Power28mW RL=16SNR90dBTotal Harmonic Distortion0.1%Support for SBC/AACForward Transmission Distance10MSupport Micro USB Interface 5V Power SupplyWeight: Approx. 141g.Package List:1 xMusic Receiver1 x 3.5mm Audio Cable1 x For RCA Audio Cable1 x Charging Cable1 x Manual