Reliable combination of telephone, motion sensor, and amplified microphone to alert you before wandering occurs, wherever you are, day or night, without fees! Works just like an ordinary telephone, but you can turn on the integrated motion sensor for 24/7 active monitoring. When the patient attempts to leave, the 20' invisible beam is interrupted, prompting the telephone to call any number (including cell phones!). During the call, you can even â??listen inâ? to sounds in the room to plan your response. System will disconnect after 30 seconds and re-arm automatically. Operates from any phone line, requires no installation, no monthly monitoring fees, and is completely portable.