❗Irreversible Left Handle❗ STRONG & FIRM STRUCTURE: the whole lock body adopts the most solid lock shell material - Stainless steel 304, with the advantages of anti-rust, anti-drilling, anti-prying and extra long service life; Precision copper gear transmission design enhance durability; USA TI code chip, preventing high-frequency pulse unlocking. | LARGE CAPACITY AND MULTIPLE UNLOCK WAY: UP to 200 user IDs could be registered to this security biometric smart lock and both fingerprint and code unlock ways are available for each ID; So, please enjoy the latest biometric technology which brings you convenience and security. | SENSITIVE FINGERPRINT READER: ADWOLF A60 fingerprint door lock adopts live semiconductor sensor and 360-degree fingerprint recognition allows this lock to read your fingerprint within 0.5 seconds (false accept rate 1/1,000,000, false rejection rate 1/1,000,000). It works well with 4--80 years old. | HIGH-SECURITY & SURVEILLANCE BIOMETRICS: Our smart door lock is ensured to be safe for your home and office, attributing to its anti-fake finger, anti-peep password, and anti-technical unlocking functions. The security level can reach a higher level by using the double verification feature, making it even qualified for bank or important warehouse. | ABLE TO BE WIDELY USED: This keyless entry smart lock fits door thickness between 1-1/5" and 2-2/5"(30-60mm); Operation temperature from -4°F to 140°F; Anti-Collision, waterproof, rustproof, suitable for most of inside and outside doors;