Economical, flexible and expandable. This is an ideal system to monitor residents at risk for fall or wandering in a home or facility Complete system includes: 1 wireless bed exit alarm, 1 cordless weight sensing bed pad. Portable, meaning you can place it by the bedside to be alerted anytime which gives you or the caregiver freedom to attend to other duties, yet receive an audible and visual alert at the monitor, when assistance is needed. This system can be expanded to fit your needs. It will also work with motion sensors and nurse call buttons. The portable cordless alarm will also work with 3 "C" batteries ( not included) or AC-04 adaptor ( not included).