XT-200(LED) is a kind of durable fail safe electric bolt with all-in-one design. In order to avoid the locking mistakes caused by internal†mechanical failures, we separate the bolt and the magnetic valve. The 304 stainless steel solid bolt can withstand 800kg holding force and can be worked in the temperature of 60 ? or -40? below zero. With the multiple designs of durable magnetic valve, special photoelectric control system, ultra-low temperature and power consumption design, anti-intrusion and smart circuit?