As a host, most locks function similarly: Guests can open and close the door with a Smart phone. The software is the real differentiator.
You could choose a software company like VirtualKEY (virtualkey.co) that integrates with multiple locks and works with airbnb (as well as other travel sites) to automatically send Guests access valid only for their specific reservation. Additionally, they will even supply you with the Smart lock.
Being a software company, they can focus all their efforts on making the Host's life easier. Broad integrations with locks, travel sites, cleaners, & easier key transfers to friends, neighbors, baby sitters, or dog walkers.