All, Hotel Doorlock KB 931 Posted on May 11, 2020May 24, 2020 by lock korea 11 May 1.Colour: silver 2.Material:stainless steel 3.Open the door way: RF card, the key 4.Reading card distance: ≤3cm 5.Door thickness: 38~70mm 6.Working temperature:-20°C~50°C 7.Quiescent dissipation: less than 15mA lock korea KB 8173 KB 932