... functions. 3)Back-rest with CPR position. 4)Plastic board, easy to assemble and disassemble. Description:The height ... lifter, safe and stable;plastic head/foot board, easy to assemble and disassemble;The mattress support ... has 4 sections, back section, seat section, thigh ... pole hole at the head end of bed;4 LINAK motors, 1 controlled box, 1 hand controller ...