... STA hardware,safety,lock for anti-theft Bi-party Automatic Sliding Glass DoorFully equipped with the last cutting edge Euro-Design ... Control System and safety precautions, Our FRD-A Automatic Sliding Door Opener can promise the high quality, safe working ... and monitored battery backup – the same with Gilgen SLM Sliding DoorPhotocell safety ,Obstacle safety ,Emergency stop and Backup batteryEasy ...