Exquisite appearance, rational structure, safe and reliable. Special for luxurious hotels use. 1000 times rolling type for records, records not lose while power off. Reserve many kinds of interface which can connected with hotel management system. Choices for IC, TM, RF Card: America TEMIC, America TI, Germany LEGIE, Philip MIFARE1 U-design handle is the first choice, maximum protect body. No longer installs the electrical machinery into inside the mortise, which facilitated the maintenance work The installment is extremely convenient, the front lock body, the mortise and the back lock body three parts is very simple and clear. More: 1. Upper Slid cover reader protection. Anti-moisture, anti-dust, suitable for using under all weather. 2. Using 4*1. 5V standard alkaline batteries. Energy saver design for extending the battery life 3. User can choose handle freely according to his/her favorite. 4. Soft music tone reminding and light indication, more fun and kindness. 5. Free rotating handle to avoid violent damage when it keeps working state. 6. Pure stainless steel mechanical rotating structure enable for using more than 10 years.