... with manual overrideHUALITE Roller shutter Tubular Motor Roller shutter Tubular Motor are used for heavy roller doors like industrial doors ... 5 degree tolerance, limit configuration by screw pole drive makes accuracy for limit <+- 1.5 degreeLarge effective limit Reasonable ... you can operate it when in emergency situation. tubular motor for roller shutter, awning, sunshade, blinds, curtain, garage door ...