The mini version of our popular TEK107 Bluetooth(R) Multipurpose Speakers carries 2 watts of great sound in its aluminum body. It can also be used as a speaker phone. (Rechargeable battery is Lithium Ion, 250 mAh.)The mini version of our popular TEK107 Bluetooth(R) Multipurpose Speakers carries 2 watts of great sound in its aluminum body. It can also be used as a speaker phone. (Rechargeable battery is Lithium Ion, 250 mAh.)