Features: brand new and high quality Single opening cabinet door: 20mm is suitable for boards below 16mm and 30mm is suitable for boards below 28mm. Wide Application: Perfect for single drawers, file cabinets and so on at home or in offices, gyms, swimming pools, etc. Artificial intelligence, the second-generation chip is upgraded. Every for time it is unlocked, it will continuously improve the pass rate through fingerprint stitching and for image recognition self-learning algorithm, and the more it is used, the more sensitive it is. Professional biometric technology, rapid identification does not wait. Drawer fingerprint lock, one-touch security for smart lock. Specifications: Material:Aluminium Alloy Color:Black/Golden/Red Bronze/Silver Type:20cmm/30mm Size:as the Picture Show Note: Please allow an error of 0-3mm due to manual measurement. Monitors are not calibrated same, item color displayed in photos may be showing Package includes: 1 Set Single Open Cabinet Door Intelligent Fingerprint Lock