Brand BEST Colors Blue Quantity 1 Type Portable Material ABS Total Power 2W x 2RMS Impedance 4ohm Channels 2 Power Supply 3 x AA or 3.7V lithium battery (not included) Plug Type USB Powered Interface 3.5mm / micro USB Other Features Using the latest global mutual patented technology only need to put the MP3 MP4 MP5 Iphone / Samsung / HTC series smart phones onto the induction area of speaker; Auto power on / off; Easy and convenient operation; Low power indication: Blue indicator will flash 3 times for every 4 seconds; Plug in 3.5mm cable bass sound performance will be better; Adjusts the volume on cell phone. Packing List 1 x Speaker 1 x Power cable (47cm) 1 x English user manual