Features:Built-in Bluetooth wireless module, up to 10m transmission distance.HIFI sound quality with high-performance 40mm drivers.Support hands-free calls with a microphone.Built-in Rechargeable Li-ion Battery.Support 99% of Bluetooth-enable devices, such as mobile phones, laptop computers etc.Specifications:Item Name: Bluetooth SpeakerSpeaker Unit: 40mmOutput Power: 3WFrequency range: 100Hz-20KHzS/N: ≥90dBTransmission Range: 10mColor: Black, Pink, Red, Green, Blue, YellowInterface: Charging PortCharging Time: 1 hourBuilt-in Lithium Battery: 3.7V / 280mAhWorking Voltage: DC5V / 500mAMaterial: PlasticDimension: H55*D55 mmUSB Power Cable Length: Approx. 24cm1x Bluetooth Speaker1x USB Power Cable