Product Specifications:
Power: 2W = 1W * 2
Frequency Range: 120Hz ~ 15KHz
SNR: 75dB
Impedance: 4ohm
Product size: Dia.22 * 110mm
Output: Mini USB Jack
Input: USB
Speaker Size: 15*25MM
Power Supply: USB or 5V/500mA adapter
Battery: 3.7V/250mA,high-performance Li-Po (Lithium Polymer) battery.