Technical Information 1. Output：2*5W（stereo）/4*2.5W 2. Respond Frequency：100Hz-18KHz 3. Input :sensitivity：500mv-1.5v 4.Voltage:AC100－240V/DC 12V(50Hz-60Hz) Features: 1. Recharge: USB recharging, USB download recharging, independent recharging synchronously 2. Compatible with CD player, PC/MAC.MP3 player, DVD player. 3. Mute function 4. Suitable for:IPOD,SONY,SONY ERICSSON,SUMSUNG, MP3,MP4and so on.