Fits 99.9 % of all doors: Works with most burglar resistant deadbolt locks, Jimmy Proof and mortise locks (with adapter). Triple battery protection : Main battery + backup + emergency power supply ensure your lock always works. 5 unlocking methods : fingerprint, automatic unlocking, NFC, voice control or even your smartwatch. 6-level security system : tamper alerts, encryption and real-time status for comprehensive security. Fast and silent performance : unlock in 0.3 seconds with 98% accuracy and improved silent motor.