BebeSounds Delux Angelcare Portable Baby Monitor Receiver detects your baby`s slightest movements, even while she sleeps. Relax away from the nursery with the knowledge that an alarm will sound alerting you to check your baby only if she becomes abso lutely still for 20 seconds and no movement whatsoever is detected. The portable Sound Monitor will pick up not only the alarm but also your baby`s cries and other nursery sounds making it 2 monitors in 1. In addition, the movement sensor has an opti onal "tic" feature; if the Sensor Pad senses movement, the Nursery Unit will continuously tick. Features: -Includes an under-the-mattress Sensor Pad, Nursery Unit, a Sound monitor and two AC adapters. -Nursery unit has nightlight and transmits room t emperature. -Two Rechargeable Parents` Unit with LCD screen that display all data on color. -Parents` Units locator and out-of-range indicator. -8 channels. -Three Receiver AC adapters (110V - 120V) are included. -Can also operate with 8 AAA batterie s (not included). -Signal Range: 820 feet