About Product:Brand: MUSOS time to market: 2015 origin: shenzhen source category: order type: mini speaker connections: bluetooth connection interface type: USB battery capacity: 300 mah frequency response range: 100 hz-20 KHZ output power: 3 w signal to noise ratio: 75 db or higher power supply mode: build-in lithium battery track: 2 broadcast time: 2 h extension storage: 16 gb bluetooth protocol: 2.1 the horn count: 1: effective short of 10 meters function: drop, waterproof, voice prompt, phone mode of operation: key applicable people: a general display: no broadcast format: MP3, WMA shell material