Carilex Medex SR303 Air Alternating Pump Only for Medical Mattress - NEW IN BOX Max Weight Capacity: Supports patients up to 150kg. Power Consumption: Energy-efficient, using less than 10W-20W. Compatibility: Designed for use with Carilex Medex or Entrix overlay mattresses, and the MobiCare air cushion. Control: Features an analogue twist dial for manual weight and comfort adjustment.