Model No : VI-112 (1) Material: Stainless steel （M69 system） (2) Color: Silver (3) Unlocking method: RF card + mechanical key (4) Reading card distance: ≦3cm (5) Door thickness: 35-75mm (6) Open direction: Left Push，Right Push (7) RFID Specifications With High Frequency Mifare System Card : - 13,56MHz technology