Alternating Pressure Pad Pump Standard Pump Bubble style pad effectively reduces pressure. Automatic 5-minute cycle alternately inflates and deflates. Heavy gauge, medical grade vinyl is easy to clean, flame retardant and anti-bacterial. Pump mounts to bed with built-in mounting bracket and features an illuminated on/off switch. Available with standard fixed pressure pump. 275 lb maximum weight capacity. 90-day limited warranty on pad. 1 year warranty on pump. 78 x 34 x 2.5 . AquaTherm AQ1000 Specifications Power 120V 120 Volt/60Hz, 1 Amp Pressure 1.9 psi Air Output 4.5 liters/min Cycle Time 5 min. Power Cord Length 10 ft Pump Size 8 1/2 x 4 1/4 x 3 5/8 Pump Weight 2.9 lb Mat size 76 long x 34 wide 3 when inflated Difference between the AQ1000 and AQ2000 AQ1000- is just a standard pump. AQ2000- comes with pressure control. pressure can be increase or decrease by rotating the knob Category Pressure Management Mattress Overlays This item ships from a separate warehouse and may require extra time for delivery.