The Mercury Advance SMARTcare® PUMP provides the differentiation, when used in powered/dynamic mode it delivers pressure relief via a series of connected alternating foam and air cells. Unencumbered by a top layer of foam on the mattress, the unique ‘foam in air cell’ construction ensures the delivery of effective pressure relieving therapy. Dependent on clinical judgement, the alternating function can be operated on either a Low or High Pressure This pump can be used with the Dyna-Form Mercury Advance mattress in all sizes , Single - King Single - Bariatric -Double & Queen.