Brand DENKO Model MP-07 Colors White Quantity 1 Type Wireless Material Plastic Total Power 4W Impedance 4 ohm Signal to Noise Ratio(SNR) 30dB Channels 2 Power Supply Rechargeable Built-in Battery External li-ion battery 3.7V / 800mAh Plug Type USB Interface 1 x Mini USB / 1 x USB2.0 Other Features Magically amplifies the sound from Iphone etc; No configuration easy to use; Audio output port- you can connect computer to this portable speaker by a audio cable Packing List 1 x Speaker 1 x External lithium battery 1 x USB 2.0 male / 3.5mm plug to mini USB male cable (80cm) 1 x Chinese & English user manual