Oil immerged gear reducer.
Mechanical limit switch.
Electronic limit can be optional.
Brake inside (KG50/KG50S).
Full-auto release (KG50/KG50S).
Manual release (KG40/KG70S).
Auto-stop when obstruction.
Auto-close function can be set.
Remote control with rolling code 433.92Mhz.
Manual release chain when power supply failure.
Wiring terminals for alarm lamp, infrared photocell, etc.