iMonitor Duo by Graco

This high-tech monitor allows you to hear two children or two rooms at the same time. Like the iMonitor Vibe, it vibrates when your baby needs you, but it also has two colored sound lights to let you know which baby you're hearing at any given time. It uses the best-performing digital technology available, offering unbelievable clarity, privacy, and a range up to 2,000 feet. Other handy features include: a parent unit locator, child unit battery back-up pack, and out-of-range alarm. Monitor two children or two rooms at the same time. Two colored sound lights let you "see" which child you're hearing as monitor switches back and forth. Can adjust volume and length of time you listen to each room. Two parent units, two child units, and four AC adapters. Secure and private transmission. Adjustable Vibe Technology; you feel a vibration when your baby needs you. Compact parent unit and belt clip for portability. Rechargeable batteries and docking station. Pager to locate parent units. Out-of-range alarm. Low-battery alarm. Range up to 2,000'