6'W, 3 level carpeted choral riser with builtin wheels. Oneperson setup is a snap. Simply unfold, then use moderate foot pressure on instantlift pedal to open. Holds 12 to 16 people. Riser units are weight rated at 200 pounds per squre foot. Springactivated lock automatically engages upon opening to prevent unit from folding while in use. Dropin couplings securely connect units together to prevent accidental movement. Ships assembled.