Product DescriptionFits 99.9% of Doors: Works with most Single Deadbolts, Jimmy Proof & Mortise locks (with adapter).Triple Battery Protection: Main + backup + emergency power keeps your lock always working.15 Unlock Methods: Use fingerprint, auto unlock, NFC, voice, or even your smartwatch.6-Layer Security System: Tamper alerts, encryption, and real-time status for all-around safety.Fast & Quiet Performance: Unlock in 0.3s with 98% accuracy and upgraded quiet motor.Product Information and SpecsDimensions: Size : 122 × 62.6 × 66.8 mm (4.8 × 2.5 × 2.6 in.)Weight : 367 g (12.9 oz.) (with batteries)Battery : 3 x 18350 batteries in parallel (4200mAh total), 12 months battery life (based on 10 locks/unlocks per day)What's Included:Lock Ultra (with backup pack)Mounting components (bracket, screws, lock cylinder parts)Magnet & wood grain stickers (×3)Charging cable & support/direction tapeRechargeable main pack with up to 12-month battery life WarrantyAll our smart locks come with a 1-year warranty.