Full Electric Hospital Bed/Mattress/SRA "Full Electric Hospital Bed Mattress SR" is a medical bed that uses electric motors for all adjustments, including the head, foot, and height, via a hand held remote control. The "Mattress" refers to the accompanying mattress, often a high density foam, which is included for comfort and to help prevent pressure sores. "SR" stands for Safety Rails, which are side rails that can be attached to the bed for patient fall protection. FDA Class II Medical