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