The default setting is OFF for auto-locking. Remove your interior cover and locate the small switches on the back of Kevo 2nd Generation. Put Switch #4 (farthest on the right) in the UP position. That will enable auto-locking. When enabled Kevo 2nd Generation will automatically throw the bolt after 30 seconds.
Attention! With these feature enabled, it is possible to lock yourself outside if you don’t have an enrolled smartphone, Kevo fob or standard key with you.