5-in-1 Keyless Entry Door Lock: Keypad + Smartphone App + Auto Unlock + Smart Watch App + 2 Mechanical Keys. APP Control & Share Ekeys: Smart locks enable you to lock, unlock, manage access, view access logs of who's entered and exactly when they did using smartphone app and authorize family, guests, or tenants to unlock doors. Note: With the ULTRALOQ bridge (sold separately), these features are available even when you are on the go. Connectivity: 2.4GHz WiFi only. Auto Lock and Auto Unlock: Smart Lock automatically locks on a preset timer and unlocks when you arrive at your door with your smartphone. Low battery alert via app. Add random digits to protect your passcode from prying eyes. With the backlit keypad, entry your home easily even at night. Voice control with Alexa and Google Assistant. Works with SmartThings and IFTTT. ULTRALOQ Bridge Required(sold separately). Certified Highest Security and Durability: Meets ANSI Grade 1 Standard. Proven for up to 35 times strength of standard residential locks along with a 7 times longer lifespan. IP65 rated dust and weatherproof external Smart Lock built to withstand heat and cold. DIY Installation: ULTRALOQ smart deadbolt fits on most US standard left-handed or right-handed doors. Replace your current deadbolt with just a screwdriver in 10 mins. Backed by Ultraloq, world’s leading smart lock brand with more than 1 million happy American users. Plus lifetime mechanical and 18 months electronic guarantee. Lifetime online phone support from Monday to Friday 7 AM to 6 PM PST and 24/7 after-sales email service.