The Sure Glow Audio Monitor by Safety 1st features a a 600 foot range and handy belt clip & carry loop, making it easy to keep an ear on your little one throughout the day. At night, the Parent Unit stands easily on your nightstand, and the Baby Unit features a comforting glow with the tap on/auto-off nightlight that lets you peek at your sleeping baby without turning on brighter lights. Energy Saving AC Adapters These adapters draw energy only when units are on. Other adapters drain power even when units are off or detached. Better for the environment...and your wallet!