Features: Smart online, CPU micro-core chip control; Pure sine wave output, no damage to motor; Wide AC input range, automatic charge when shutdown Power saving design, automatic shutdown after 10 minutes’ inverting Able to operate rolling door 18-20 times continuously Remote control operation, wall-mounted installation, small volume and light weight. Input Voltage: 145~275Vac Input Frequency: 45-65HZ Output Voltage(battery pattern): 220±2%Vac Output Frequency: 50/60Hz±0.2% battery DC voltage: 12V/7AH*2 Transfer time: 2-4ms Charging current: 1.5Amp-2Amp Size mm(W×D×H): 308*226*96 N.W(kg): 7