Bluetooth audio stereo receiver with built-in batteryConnection standby time of 18 hours and up to 3 hours of working timeUses 3.5 mm stereo jack to connect to your home stereo, TV, car audio, etc…Works with all mp3-players, phones, tablets or PC’s that can stream music via BluetoothSignal reach up to 10 mInterface: Bluetooth v.4.2, Class IIBluetooth: frequency range 2.4 GHz – 2.4835 GHz; supported profile A2DPAudio output: 3.5 mm stereo jackSound frequency responce: 20 Hz – 20 KHzBattery: 50 mAh Li-PolymerPower supply: Micro-USB input, recharging time 1.5 hoursDimensions: 62 mm x 17 mm x 17 mmNet weight: 10 g