... electric and manual operation 4)ISO,CE,CCC Specialized Electric Automatic Sliding Door Motor JM800-1P : ModelMaximum weight doors(Kg)Maximum lift ... braking when the power failure,ensure brakingis safe.4) Limit System: Correct control , easy operation , and big control range. 5 ... .) Transmission system: High precision,move steady and low noise.6) Anti-dropping ...