This Smart UVC Clothes Drying Rack is equipped with motion sensor. When it detects human movement during sterilization procedure, the sterilization will stop immediately. Before activating sterilization mode, please ensure no person or animal is staying in the room or on balcony. As the motion sensor is in the remote control, it is recommended that the remote control be installed in the entrance spot such as the side of a door or beside the balcony door. If the rack is installed on balcony, curtains should be closed before starting UVC sterilization. If it is installed in a room, please leave the room and close the door before starting UVC sterilization. To ensure proper operation of the product, please read the safety instructions in the manual before use.