HB450+ Hospital Bed, 4+1 Adjustment Fully Electrical Control HB450+ beds comes with double trendelenburg and has a configureable frame system. Each motor has 6000 N push capacity lineer actuators. Back rest, knee rest and height adjustments made by the motors. Back rest 0-70, knee rest 0-35 and height between 450 - 800 mm adjustable by hand remote control.