YB-500C (LED) is an all-metal construction electric bolt .with European-type cylinder and has both electric control and manual control functions. The bolt has 1000kg holding force adopts high class stainless steel material.the all-metal linkage parts contribute the bolt tobe worked the temperature of 60 ℃ or -40 ℃.The reliable magnetic valve and special photoelectric control system, Cryo Fundamentals and power consumption design, Intelligent circuit ,reveal its feature of multifunctional and creativeness