1,500-foot range lets you listen for your baby everywhere you go in your house and yard DECT 6.0 digital technology eliminates white noise and provides crystal clear transmission Visual sound alert LED lights and vibrating alert feature provide additional ways to know if your baby is awake Two-way communication allows you to talk to your child from another room Data encryption allows for ultimate privacy and security Baby unit features a soothing light to gently illuminate the nursery Five-level sound indicator lets you know when your baby's cries are escalating Belt slip on parent unit allows for easy portability and keeps you in the loop even as you move around your house Rechargeable battery lets you move the units around as necessary without always needing to be near a wall outlet Backlit display on parent unit lets you easily find the monitor at night