Features: 1) Adopts original factory sealed Philips chips from Germany 2) Highly integrated design with MCU, timer and memory on one board, making it easy to use and manage 3) Advanced circuit protection, even insert other steel cannot damage its circuit. Inserting card wrongly will not disturb the contact, preventing circuit damage caused by forced insertion 4) PCB adopts SMT techniques, giving it higher reliability after complete aging tests 5) Surface of PCB has been printed with a specific paint, which is anti- cauterization, anti-mildew and antistatic, with low energy dissipation and long service life of more than 10 years of normal use 6) Lock adopts Siemens encrypting type SLE4442 IC or Atmel Temic card or Mifare card, which is highly reliable and difficult to copy because of its strong protecting function that prevents decryption and self-damage 7) Front of IC card: hotel name, star signal, telephone, address, hotel logo, hotel views, hotel image, etc. 8) Back of IC card: written instructions or designs for teaching the guest how to open the door 9) Complete rank management and area control of the hotel, can utilize one card for several locks and one lock with several keys 10) Control the rights of opening, to achieve limiting the time of guest enter the room and avoiding the guest leaving without paying 11) Advanced memory function of recording opening status, can save as many as 256 records, easy to manage and search 12) Highly reliable emergency control system makes sure the lock can work normally under emergencies by mechanical key 13) Adopts international standard 5 lock tongues, which have independent anti-dial tongue, main lock tongues and back lock tongues 14) 15) Change the batteries after the alarm of low voltage. The lock can be opened 200 times after the alarm Specifications: 1) Working temperature: -20-50°C 2) Static energy dissipation: ≤ 3μA 3) Dynamic energy dissipation: about 200mA 4) Comparative humidity: 5) Antistatic: 15,000V (can work stable under strong static, without losing address) 6) Power supply: 2-3 1.5V alkaline batteries 7) Battery usage period: 12-16 months