1/2 HP 115V, 1Ph w/CPS-U Commercial Monitor Photoeye, For Standard Lift Sectional Doors, Medium Duty Logic programmable integrated circuit board, High starting torque motor with overload protection, Quiet gliding rail spacers, Quick mount swivel header bracket, Built in 315 MHz Receiver for Security + & DIP switch remotes, Motor Head Only, Track and chain sold separatley.