Pocket-size, high quality stereo sound, built-in digital amplifier             
Built-in lithium battery , 5~10 hours Long playback time hours
Can material:Pure ABS
 

Specification:

Rate power: 3W x 2
Frequency range150HZ~20KHZHz
Impedance: 4HM(Ω);Speaker unit:40mm;Input voltage:DC5V
Input voltage: DC5(V)             
Frequency response: 50/60HZHz
Interface: headphone jack output (3.5mm)