With USB, 3.5mm and 2RCA connection options, you can enjoy music wirelessly on 2 speakers simultaneously.Support dual audio port connection. For 3.5mm and 2RCA audio ports, it is suitable for more devicesSystem support: all Bluetooth audio devices; NFC devices available. The integrated chip allows you to Contact this receiver and connectdirectly to NFC-enabled mobile phones or other Bluetooth devices.Using the charger cable, connect with your car / other power source, when you start the car or have power, it will automatically turn on and automatically connect to the device it was last connected to.Interface: analog stereo / AUX3.5mmtResistance: 75 ohmsFrequency response range: 10 Hz-20 kHzSignal to noise ratio: more than 110dBEffective distance: 10 meters.Distortion + noise:Performance: fidelity levelBluetooth version: 5.0Support: A2DP / AVRCPBluetooth name: H2Colour: blackMaterial: ABSSize: 105 x 65 x 25mmPackage Contents:1 x Host1 x AV cable1 x Power cord1 x Audio cableOnly the above package content, other products are not included.Note: Light shooting 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.