XTM-700A(LED) is an Fail Safe electric bolt with all-metal construction.with 304 stainless steel solid bolt and 2000kg holding force. The Door signal is NC.It can operate at the temperature of 60 ? or -40 ? below zero based on the all-metal linkage parts. With the diversified design of durable magnetic valve, special photoelectric control system, ultra-low temperature and power consumption design, anti-intrusion and smart circuit.