A UPS (Uninterruptible Power Supply) 750VA is a device that provides temporary power during a power outage or fluctuation. It typically has a battery backup that can keep your devices running for a certain amount of time, usually in the range of several minutes to an hour or more, depending on the capacity of the battery and the load on the UPS. The 750VA rating refers to the amount of power that the UPS can provide to connected devices, with VA (Volt-Ampere) being a measure of apparent power. This type of UPS is typically used for small to medium-sized homes or businesses with basic power protection needs.