User:Power supply: Battery(aaa 1.5v*4), DC 5v(usb cable for pc), or AC power adaptor cord(output 6v,300-800ma)Speaker unit:52mmx2w*2(4ohms)Output power:2w*2(1khz 10% thd)Erequency response:150hz-21khz

User:Powersupply: Battery(aaa1.5v*2), DC 3.0v(output 3v,300-800ma)Speaker unit:3w*1(Output power:3w*1 4ohms(1khz 10% thd)Erequency response:275hz-20khz

User:Power supply: Battery(aaa 1.5v*4), DC 5v(usb cable for pc), or AC power adaptor cord(output 6v,300-800ma)Speaker unit:52mmx2w*2(4ohms)Output power:2w*2(1khz 10% thd)Erequency response:150hz-18khz

User:Power supply:battery(aaa 1.5v*4),dc 5v(usb cable for pc),or ac power adaptor cord(output 6v,300-800ma)Speaker unit:52mmx2w*2(4ohms)Output power:2w*2(1khz 10% thd)Erequency response:100hz-20khz&qu

User:Powersupply:battery(aaa1.5v*2),dc 3.0v(output 3v,300-800ma)Speaker unit:3w*1(Output power:3w*1 4ohms(1khz 10% thd)Erequency response:275hz-20khz"

"power supply: Battery(aaa 1.5v*4), DC 5v(usb cable for pc), or AC power adaptor cord(output 6v,300-800ma)Speaker unit:40mmx2w*2(4ohms)Output power:2w*2(1khz 10% thd)Erequency response:150hz-18kh

Handing Power:2.5W*2Frequency response:180Hz-20KHzSpeaker unit:50mm*2w 4ohmsSensitivity:70dBPower supply: Battery""AA"" 1.5*4 DC5V USB cable for PC or AC power adaptor cord output

User:Power supply: Battery(aaa 1.5v*4), DC 5v(usb cable for pc), or AC power adaptor cord(output 6v,300-800ma)Speaker unit:52mmx2w*2(4ohms)Output power:2w*2(1khz 10% thd)Erequency response:150hz-18khz

User:Power supply: Battery(aaa 1.5v*4), DC 5v(usb cable for pc), or AC power Adaptor cord(output 6v,300-800ma)Speaker unit:52mmx2w*2(4ohms)Output power:2w*2(1khz 10% thd)Erequency response:150hz-19khz