Full DescriptionSpecification:General Design PortableSupports Handsfree ， Bluetooth ， Microphone ， Loudspeaker ， TF Card Music PlayingFunctions AUX Function ， StereoConnection WirelessMaterial ABSInterface 3.5mm Audio ， Micro USB ， TF Card Slot ， USBPower Source BatteryCharging Voltage DC 5V 2.3ACharging Time 3 hoursWorking Time 5 hoursBattery Type Li-ion batteryBattery Capacity 4000mAh (3.7V)Size 182mm x 79mm x 79mmWeight 405gParameters Protocol GFSK ， ┪/4 DQPSK ， 8DPSKFrequency 105Hz-20kHzSNR 80dBFrequency Range 2.402-2.480GHzTransmitter Power 0-4dBmTransducers 1.5 inch (40mm) x 2Amplifier Power 6W x 2Package Include1x Speaker1 x English User Manual1 x 3.5mm jack cable1 x USB cable