AngelCare Deluxe Movement & Sound Monitor - 1 Unit PkThis monitor combines a quality sound monitor and a movement monitor in a single system. Whether baby is awake or sound asleep, Angelcare® under-the-mattress Sensor Pad will detect all of her movements. Rechargeable Parents Unit (4 AAA rechargeable batteries included).Features Under-the-mattress Sensor Pad detects every baby"s movement baby makes Alarm sounds after 20 seconds if absolutely no movement is detected Adjustable sensitivity Battery or AC adapter operated Optional "tic" sound to hear baby"s movements 8 channels to minimize interference Automatically converts to battery in case of power failure Sound lights to see and hear baby"s sounds Low battery indicator Practical soothing night-light. Choice between voice activation or continuous sound reception Nursery room temperature display on the Parents unit.Includes: 1 parents unit, 1 nursery unit, 1 charging base, 1 sensor pad, 2 AC adapters and 4 NiMH rechargeable batteriesModel #: AC401