The Graco Secure Coverage Digital Baby Monitor has an expansive 2000 foot range for complete household coverage, so you can always stay in touch with baby. With digital clarity and performance, you"ll see, hear, and feel your baby with the unique added vibration alert feature. Features: Secure digital technology for optimal clarity, performance and privacy 900 MHz frequency means no interference from phones and electronics Up to 2000 ft. range to hear baby from any room in the house Sound lights for visual connection to baby Exclusive Graco vibration notification technology lets you feel baby"s call and can be turned on and off Low battery alarm reminds you to charge the parent unit Belt clip gives active parents wear-it-anywhere convenience Battery backup in child unit for added peace of mind Includes 1 child unit, 2 parent units, 3 AC adaptors, and instruction booklet