Mini Waterproof Bluetooth Speaker

Product information: 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 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: Audio*1+Bracket*1