SpecificationBluetooth v5.0.+EDRRange: Up to 10MBluetooth transmitter frequency range:2.402-2.480GHzPower:5 W MaxFrequency response: 100Hz – 20kHzsensitivity:65dB+/-3dBUSB: USB 2.0/up to 32GB;USB 3.0/up to 16GBTF card: up to 32GBFunctions: hand-free phone/play through bluetooth/play though TF card/FM radio/play through U disk/clock/alarm clockPower supply: Micro USB/Built-in DC3.7 1200mAh lithium battery (cannot be removed)Operating current: 1A MAXPlaying time: 3-4 hoursCharging time:2-5hoursProduct size: 140x70x47mmProduct Weight: 320gAccessories: USB charging cable x1; 3.5 stereo audio cable x1