About this item Smart Scenes and Management: When family members go home and door lock alarms,trigger linkage.Set the fingerprint, code and effective time of the member account. Fingerprint and Code: In the initial state, any fingerprint and code can be unlocked.100 fingerprint users,high-pixel fingerprints are suitable for families with children and the elderly.8-10 digits length unlock,100 code user.Code protection is not afraid of prying the eye. App and Key:Bluetooth remote and temporary code unlocking are more convenient and safe.Auto lock, Lock volume, lock language, and lock Log suitable for a variety of scenarios.C-level keys are more secure. Diy Installation:Zinc alloy sturdy material,installs in minutes with just a screwdriver.The lock fits both right handed and left handed doors,door thickness range:1-3/8 In to 2-1/2 In, latch has adjustable backset 2-3/8" to 2-3/4" to fit US standard door preparations. IP65 HIGH WEATHER RESISTANCE: Special waterproof technology used inside the door knob which can work well in the sun or rainy,suitable for all weather in the US. Environment Operating temperatures: -22°F to 176°F. Lifetime Customer Support: If you encounter any product or service issue, we can help you resolve the problem, efficient 24-hour online service.The door lock provide limited lifetime mechanical and finish warranty.