1.Safe precautions When the operating sliding door hit barrier, it will reverse sliding automatically. If you choose infra-red beam system, when it detect people of object, it would open immediately. Choosing the UPS battery system could ensure the door to operate continuously for 30 minutes under no power-supply conditions. Choosing the durable electro-mechanical lock system could ensure the door to be locked more safely. 2.It has multi-activation device function Radar sensor Password access ID card Manually control: using hand switch, foot switch and long-distance control