Key Specifications / Overall System: Number of charging compartments :50(receiver or transmitter) Power requirement :100 ~ 240V AC switching adaptor 12V DC, 12.5A Indicator lights LED orange :battery charging LED green :battery ready Charging current :300 ~ 330 mA Charging time(Ni-MH. 1300mAH) :4 ~ 5 hours Charging control :PWM control,–ΔV and timer power-off detector, one-time battery detector Dimensions :D 83 × W 62.6 × H 18 cm Weight :36 kg