1.Aluminum alloy,Silver and Black simple design 2.Door types application: Wooden/security/ copper/stainless steel doors ect. 3.Wide Projects Application Hotel,Apartment,Rental House,Airbnb,Office,School 4.User-friendly operation. 5.Swedish FPC fingerprint head technology. 6.Anti-Tesla interference and more safe. 7.With Double latch,anti-threft and upgrade security leval 8.USB emergency charge port. 9.Apply and kind 13.56mhz cards setting to be users. 10.Easy to installing.