3W output, bass reflex structure, 45mm full range driver unit, built-in 600mAh battery, with TF card play function, hands free, Aux in

*Bluetooth Version: 2.1
*Rated Power: 3W; 
*Driver Unit: 45mm  
*Frequency Response: 120Hz~18kHz
*Receiving Range: ≥10M (No blocking)
*Power Supply: DC 5V
*Battery Type: Li-ion (built-in) 3.7V, 600mAh
*Operating Time: ≥8Hrs; 
*Charging Time: 3Hrs