Electron DSP pure sine wave 2000VA electric instant power supply IPS has for 14 fans with 20 lights and 1 TV, backup 2 hours and above, pure sine wave and smart battery management system, over load protection, save 30% electric bill than general type IPS, constant output voltage, smart short circuit protection, automatic low battery protection, highest power factor for low electricity bills. Also this Pure sine wave 2000VA electric IPS comes with 3 years guarantee.