Intex instant power supply power inverter IT-IV400W has 400 watt capacity, 70AH dry cell battery, pure sine wave, micro-processor based design, low battery indicator, 12V DC battery, input voltage range 80 - 290 Vac, input frequency 45 - 65Hz, output voltage range 80 - 290 Vac, output frequency 50/60Hz. Also this Intex electric IPS IT-IV400W comes with overload alarm.