Mini Waterproof Bluetooth Speaker sound bar

Type: Bluetooth speaker connection method: Bluetooth connection interface type: Usb battery capacity: 300mah frequency response range: 100hz-20khz output power: 3w signal to noise ratio: ≥75db power supply: Built-in lithium battery channel: 2.1 + 1 duration: 6 hours extended storage: Not supported bluetooth protocol: 4.1 number of speakers: 1 effective distance: 10 meters function: Waterproof, voice prompt, dustproof, call function operation method: Button playback format: Mp3 shell material: Plastic speaker adjustment method: Button appearance size: 98 * 88 * 43mm power mode: Usb color: Blue, yellow, black, red, green Packing list: Speaker*1+usb*1