Features professional design, exquisite appearance, the former beauty lock zinc alloy / aluminum alloy material, fine plating process a single bus identifiable information transmission technology is mature, stable electrical and mechanical drive structure protection, no pollution, no harm to the design of industrial-grade motherboard chip direction to guide the development of three electronic lock technology management, can be equipped with two cards total, 11 waiter card and a guest card dual overall card design so that the total card loss and damage to tighten the screws no longer worry, installation is simple, convenient single, dual card mode selection door special power-saving design requires only three batteries, capable of reaching the four batteries from other manufacturers External power supply emergency power door locks parameters: DC4.5V, using 3 AA batteries (alkaline recommended battery), with brown tips Static power consumption: less than 6.7μA start current: less than 300mA effective unlocking time: 4 ~ 5 seconds Surface treatment: beach front lock of gold, silver or Norway primer, and made light curing light; the lock beach body corresponding silver or gold, Norway finish Environmental requirements: Temperature: -20 ℃ ~ 55 ℃ Humidity: 20% ~ 90% TM card: DS1990A Bracelet: TPU green material, color: red, yellow, blue lock: PC alloy Material, color: yellow, black hole after the lock installation diagram of the basic steps: 1, in the proper position to open the door for 26 mm diameter (greater than 26 mm can be) over the line hole; 2 through 4 screw diameter of 4 mm self-tapping screws to lock the front door to the outside of the bottom shell fixed; 3, the electrical connections after the lock body through the door openings by three self-tapping screws fixed to the inside of the rear door lock;