Graco - Nursery Monitors - 100% Digital Technology Crystal Clear Clarity to hear the tiniest whimper Complete Privacy to hear only your baby Extended Range up to 2000 ft to hear your baby all around your home Exclusive Vibe Technology- Adjustable sensitivity vibration to feel when your baby needs you Rechargeable batteries Docking stations Parent unit finder feature Out of range alarm Child unit battery back up for peace of mind Sound lights Belt clip for portability Low battery alarm Includes 1 parent unit, 1 child unit, and 2 a/c adaptors