As SentriForce offers a variety of video surveillance systems in varying channels, the answer is dependent. Clients who utilize the monitored mobile video surveillance units, there is only a thirty (30-day) commitment. The client can utilize the unit and service as needed. On the apartment community, HOA and light retail/commercial services offered, SentriForce has options from one (1) year up to three (3) year agreement terms available for our clients. For these types of clients, there are significant advantages for longer term agreements.