Y4K Telcom Corporation Co., Ltd.

Feature Convenient because it does not need a key Auto-locking system:Secure, convenient with automatic locking and instrusion alarming function Specifications Unlock with a passkey.  Prevention device attached in the cylinder. (It is safe because one cannot feel the built in cylinder upon unlocking with passkey due to pressure being applied on the injection point of cylinder key) Battery change alarm (If the battery is running down, the device alarms to let you know the time to change one month in advance) Fingerprint prevention buttons (Fingerprints will not remain on the buttons so, you can use it without worrying about the password exposure) Emergency Power Supply (If something 's wrong with batteries, you can supply external power using the power supply jack) Indoors Opening and shutting Function Device (With simple operation, opening and shutting is possible from inside. senior citizen and the disabled can use it easily)