Supports: Hands-free Calls、 TF Card Music Playing、 Volume Control、 Microphone、 BluetoothFunctions: Stereo、 AUX FunctionCompatible With: TF/Micro SD Card、 iPod、 MP3、 iPhone、 MP4、 PSP、 MP5、 Laptop、 Mobile Phone、 Tablet PC、 PCConnection: WirelessInterface: 3.5mm Audio、 Micro USBAudio Source: Electronic Products with USB port、 Bluetooth Enabled Devices、 TF/Micro SD Card、 Electronic Products with 3.5mm PlugMaterial: Metal Specification:Protocol: AVRCP、 A2DPTransmission Distance: W/O obstacles ＋10mFreq: 100Hz-18kHzS/N: 50dBBluetooth Version: V3.0+EDRPower Source: USBCharging Voltage: DC 5VPower Output: 3WCharging Time: 2 hoursBattery Capacity: 500mAhSize (L x W x H): 6.3 x 6.3 x 6.2 cm/2.48 x 2.48 x 2.44 inch Package Included: 1 x Speaker1 x USB Cable