HI-M portable MP3 mini vibro speaker,resonance sp

Model:HI.M MP3 portable mini vibration speaker,vibro speaker,resonace speaker,vibrating speaker,USB speaker 1. Using our self-developed core of technology called preaching vibration multidimensional sound,. 3. (1.)USB power supply mode:connect the mini USB port with the computer USB port and the audio plug. (2.)Rechargeable lithum battery power supply mode:connect the mini USB port with the product,and connect the other side audio plug to other equipment(such as ipod,iphone,computer,mp3,mp4 ,etc.) 4. 1.power supplyDC5V,built in rechargeable lithum battery 2. Power consumption: Max 2.5W 3. Frequency:100Hz 20kHz 4.product sizeLxWxH81mm x 80mm x 35mm 5.net weight350g 5. Note: 1.when the power is off,please charge it for about 5 hours for the first time,and next time pls charge it for 2-3 hours,if you dont use it for a long time,please pull out the USB cable. 2. 3.Avoid contact with corrosive gas or liquid, not a long period of the products on the bumps,heat,humidity and high temperature areas.