WATFOERS connection interface type: USBBattery capacity: 1200mAhFrequency response range: 100HZ-20KHZOutput power: 5WSignal to noise ratio: greater or equal to 75dBPower supply mode: built-in lithium batteryChannel: 1Playing time: 6 hoursExpansion storage: 32GB protocol: 4.1Effective distance: 10 metersFunction: Insert card, drop resistance, voice prompt, call functionOperation mode: buttonApplicable people: generalDisplay: None format: MP3Whether to support APP: NoSupport format: U Disk/TFSpeaker adjustment method: knobIs there a radio function: Yescolour: blackMaterial: plasticsize: 119x198x210mmPackage Contents: 1xhost1xdata cable1xaudio cableOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is /- 1-3cm.