DescriptionIt is a ultra-portable, battery operated mini stereo system that plays music from your mobile phone, MP3, MP4, PC, iPod, iPad, iPhone and other audio devices with 3.5mm audio plug. It is your best choice to enjoy your favorite music.Features- Color: Random Color. - Material: Plastics. - Size: 6 * 5 * 5cm(L * W * H). - Output power(RMS): 3W. - Built-in rechargeable polymer battery lasts up to 6 hours of continuous use. - Switch to save battery life while not in use. - Red light-charging. - Blue light-charging full/ working. - Work with mobile phone with 3.5mm audio plug, iPhone, MP3, MP4, PC, and so on.Attention1. Battery should be charged 2 hours at least. 2. Audio dock could be charged in PC with USB cable or by a charger. 3. Battery can be used repeatedly for about 500 times.