Zigbang SHP-A21 Digital Gate Lock Sequential Unlock - You can unlock your gate and door lock at the same time for entering and leaving. Activate or deactivate the settings to sequence your gate and door lock. Hook-type Deadbolts - To enhance security, Zigbang applied hook-type deadbolts. The gate lock could also be installed on sliding doors. Dual Fingerprint - Our gate lock has fingerprint sensors on both outside and inside unit for double security. Types of access: PIN RFID Fingerprint Remote controller Emergency key Functions Sequential unlock - Customize your sequence settings as you like. Voice guide - Gate lock will provide voice guidance during settings. LED notifications - Shows the lock status of the lock. Volume control - Adjust your volume according to your preference. Prank prevention - Alarm will go off if someone tries to enter using incorrect authentication for consecutive times. Low battery alert - The lock will show low battery LED sign when the batteries are low. External lock mode - Alarm will go off when someone tries to unlock from the inside of the house. High temperature sensor - The lock will automatically unlock itself when abnormal heat is detected from the inside of the house. Emergency power supply - Power can be supplied using 9V batteries when there is no power. Features Change password Register Fingerprint Register tag key Prank alarm Dual authentication Alert / Alarm Automatic / Manual lock Sequential unlock settings Volume control Away mode Intrusion alarm High temperature alarm Specifications Dimensions (mm): Front-body: 176 (L) x 74 (W) x 20 (D)Back-body: 176 (L) x 74 (W) x 38 (D) Door to gate clearance required: 40mm Requirements Door to Gate clearance required: ≥ 120mm from door to gate (Back to Back) ≥ 50mm from door to gate (Opposite)