Output Power (RMS): 3W * 2PCS 
Lithium battery: 3.7V 1000mA (3hours) 
Colorful: Black, white 
Frequency Response: 50Hz-20kHz 
S/N Ratio: >85dB 
Input Sensitivity: 500mv RMS 
Driver: 2"4Ω 
Function: "SD card +USB flash disk + 
Bluetooth+lithium battery" 
Bluetooth rev: 2.1 
Dimension (W*D*H): W190*D40*H72.5(mm) 
Color: Black 
Package: Paper box 
Accessories: USB cable, audio in cable, velvet bag, user manual