Model AC403. BONUS: NEW 4 AAA Energizer rechargeable batteries. - Under-The-Mattress movement sensor pad - senses each and every one of your baby's movements and will sound an alarm if no movement is detected after 20 seconds, so you and baby can sleep tight. - Full color digital display - the easy-to-read screen on the parent unit clearly displays nursery room temperature and sound lights, as well as your various settings. - Portable and rechargeable parent unit - carry the parent unit with you from room to room for peace of mind. - Nursery night light - a gentle little glow to guide you when you walk into baby's room. - Out-Of-Range indicator - up to 820 feet (open field). Excellent condition + original box+ manual Smoke/pet free home. please email.