This is a replacement pump for the Med-Aire Alternating Pressure Mattress Replacement System (Model #14029). The pump has an adjustable cycle time from 10, 15, 20, or 25 minutes. Also, this pump has multiple modes, either static or alternating-pressure, where the pump will automatically return to alternating mode after 2 hours. This pump has a 15 foot power cord to give you more placement options, and also has a low-pressure alarm, power failure alarm, and a system alarm that alerts you of a problem with the alternating pressure function. This pump will only work with the 14029 system. Dimensions of pump: 4.5"L x 14.2"W x 9.8"H.