VTech DM521-2 Brand New The VTech DM521-2 Digital Audio Monitor with DECT 6.0 digital technology provides crystal clear transmission, eliminating the annoying background noise. It has backlit display on the parent unit, 5-level sound indicator and rechargeable battery with low-battery alert on the parent unit. The audio monitor features a two-way,talk-back intercom and up to 1,000 feet of range, so you can soothe your child from anywhere in your home. DM521-2 Features Vibration Notifications Backlit Display Belt Clip Included w/ Brand New Models Low Battery Indicator Talk-back Intercom Range 1000 ft. Adjustable Volume 5 Level Sound Indicator DECT 6.0 Digital Technology Digital Audio Monitor Temperature Alerts With Configurable Alert Range Nightlight NiMH Battery