For parents who want to be active during baby's naptime, this monitor gives you a long-range connection with your baby that's as clear in the backyard as it is in the kitchen. With 900 MHz technology, you get a more powerful signal with excellent clarity and greater range - up to 900 feet (under permitting conditions). So you can go anywhere around the house or yard and still stay in touch with baby. Other features include out-of-range indicator light and belt clip for portability. Requires 3 "AAA" 1.5V batteries, not included. Measures 8.25" x 3.4" x 12.25".