Kwikset 925KEVO2 Second Generation Kevo Bluetooth Enabled Deadbolt SmartKey with RCAL Latch and RCS Strike Round Corner Adjustable Deadbolt, 2-3/8" or 2-3/4" BacksetRound Corner Full Lip Deadbolt Strike5 Pin Cylinder2-1/8" CrossboreKevoKwikset SmartKey7-1/4" x 3-1/4"; 1" ProjectionThis Single Cylinder Bluetooth-Enabled Deadbolt Can Be Locked Or Unlocked By Touching The Exterior Side Of The Deadbolt, Or With A Key From The Outside, As Well As The Turnpiece From The Inside. Kevo (2Nd Gen) Also Comes With Inhome Locking & Unlocking FrKevo Now Works With Alexa Voice Commands (Requires Kevo Plus Hub, Sold Separately). You Can Lock/Unlock (Pin Required) And Check Lock Status.Touch-To-Open™ ConvenienceSend And Manage Ekeys Via Your Smartphone For Anytime Access, Scheduled Access And 24 Hour Guest AccessReceive Notifications And View Usage HistorySmart Home Compatibility With Amazon Alexa (Requires Kevo Plus), Ring Doorbell, Skybell, Nest Learning Thermostat, Select Honeywell Thermostats, Android Wear And IftttMilitary Grade Pki EncryptionPatent Pending Positioning Technology Security Feature Automatically Detects If You Are Inside Your Home To Prevent Unauthorized AccessCompatible With Iphone 4S Or Higher And Select Android 5.0 Or Higher DevicesAlso Works With Kevo Fob And Kevo Plus Accessory (Both Sold Separately)Limited Lifetime Mechanical and Finish, 1 Year Electronics Warranty