The Pharmacy - AngelCare AC402 Deluxe Baby Movement & Sound Monitor $234.95 Delivered
Features include: (from website)
"Under-the-mattress Sensor Pad detects all baby's movements
Alarm sounds after 20 seconds if absolutely no movement is detected
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.
Vibration option on Parents Unit when alarm (dependent on models)
Extra Parents Unit: You only need to program one parents unit the other will automatically set up."
Have not used this personally but have heard good reviews.