... in, apply to PC,mobile phone,mp3.mp3, etc Specifications Portable size Built-in bluetooth RF wireless module Metal cabinet,rechargeable ... max9.Last Time: 4hours (via bluetooth to play)10.Driver Unit: 40mm, 4 Ohm ,3W11.Dimension:(L)55MM*(H)55MM12.Power ... .:0.5KG4.50PCS/CTN Blue and white porcelain wireless rechargeable portable,mini bluetooth speaker for iphone &ipad&PC