Blue ear&reg; Bluetooth Portable Stereo Wireless Speaker For Phone and Computer (Bluetooth Blue) Bluetooth connect with your music source, an audio output allows you to connect multiple speakers for an even better sound. Better your sound volumn and sound quality from phone, computer and Ipad Built in Li-ion rechargable battery, supports 7 hours music playback 40mm driver produces Hi-Fi sound This booming Can is extremely portable housing measuring in at under 2.5 tall and less than 2 wide, fit conveniently in your luggage, backpack or purse.