Works with Alexa for voice control (Alexa device sold separately). Wireless Requirements-2.4GHertz Wi-Fi network (Connect Wi-Fi Bridge sold separately) Control and monitor your door from anywhere. Lock and unlock your door, control keyless access and keep track of who comes and goes, all from your phone. Alexa can also provide notifications when your battery is running low so you can proactively replace them. Set up smart reorders through Dash Replenishment to make sure you always have replacement batteries when you need them. Be sure you’re secure with DoorSense. Only August has DoorSense to tell you if your door is securely closed and locked.Holding force:600 lbs Always know who is coming and going. Track activity at your doorstep with a 24/7 Activity Feed Keep your existing lock and keys. Easily attaches to your existing deadbolt; use your existing keys at anytime. Requires 110 to 240 Volts Locks automatically behind you, and unlocks as you approach. Requires iOS (9.0 or higher) or Android (5.0 or higher) smartphones. Retrofit installation works with most standard single cylinder deadbolts Simply speak to lock your door. Tell Alexa, Siri or the Google Assistant to control your August Smart Lock Pro + Connect Simple, DIY installation. Install in about 10 minutes with just a screwdriver. Please note that this lock is not currently compatible with Mortise locks or Double Cylinder deadbolts (key hole on both outside and inside of door). Check compatibility in product documentation below › See more product details