Details information:
1.support usb/sd/mmc card.
2.for use with:mobile phone/ipodpsp/mp3 mp4.
3. Battery:build-in li-battery,rechargeable.
4.3.5mm audio input port.
Technology parameters:
1.out put:rms 3wx2.
2.frequency response:100hz-20khz.
3.s/n radio:>=85db.
4.lond speaker:1.5"x3w/4ohm.
5.input:3.7v.
6.built-in rechargeable.
7.li-ion battery.
Accessory:
Usb cable,audio cable. battery.