Amazon.com

This configuration includes two parent units (monitor) and one baby unit (audio monitor)
DECT 6.0 provides crystal clear transmission, eliminating the annoying white noise you hear from analog monitors
5-level sound indicator – graphic bars on the parent unit indicate the level of sound in your baby’s room so you can visually monitor the noise level with the unit muted
Sometimes all your baby needs is to hear the sound of your voice – comfort your infant with the 2-way talk-back intercom
Rechargeable batteries provide parent unit with up to 18 hours of monitoring time on a single charge, or use two AAA batteries (not included)
Go hands free with the belt clip on the parent unit – carry the parent unit everywhere you go without the hassle of holding it. The operating range of the parent unit is up to 1,000 feet outdoors or 150 feet indoors
Parent unit can be set to beep if: (1) link between the parent unit and the baby unit is lost, and/or (2) rechargeable battery is low
Language is preset to English, but can be switched to French or Spanish for all screen displays
The loop on the baby unit doubles as a soothing night light for your little one
Vibrating sound-alert on the parent unit – enjoy some added peace by being silently alerted when there is sound in your baby’s room

Amazon.com: VTech DM221-2 Safe & Sound Digital Audio Baby Monitor with Two Parent Units – BIG Price Drop!