The APC Back-UPS HI Home Appliance & Lighting UPS is a child-safe and environmentally friendly way to keep your lights, TVs and other home electronics running during extended power cuts. It's easy to install and maintain, and produces a modified square wave output that is perfect for all your home electronic appliances. The Back-UPS HI lighting UPS was designed with aesthetics, silent operation and efficiency in mind. Features like a built-in holiday mode switch to preserve battery charge while you are away, LED status indicators and automatic diagnostic self-testing are all standard. Additional battery packs are also available to keep your household running for even longer periods of time.