Smart Caregiver Economy Wireless Monitor And Motion Sensor Smart Caregiver Versatile and Economical Wireless Monitoring System comes with 1 Economy Cordless Monitor and 1 Motion Sensor with swivel bracket for specific area motion sensing. Easy to monitor loved ones getting out of bed or leaving the room. Can be used above or by doorways or next to bed. The Monitor uses three "C" batteries and the Motion Sensor uses three "AA" batteries. (not included) Both Monitor and Motion Sensor can use AC-04 power adapter (not Included) Adjustable volume (Hi/Lo/Med) monitor also is expandable- handles up to 6 Cordless components