... system, double operating interface of Chinese and Englishl Built-in lithium battery with high capacity for over 10 hours of operating lifel ... ), (AC adapter 100~240V,50/60Hz,1.5A),Built-in Lithium battery: 4400mAh,7.4V,operating time≥10 hours3(3)Dimensions210mmx100mmx60mmWeightabout 1kgNote ...