Tech
Smart Lock
A keypad lock that issues a unique code per booking.
Why you care
It removes the single most common operational failure — key handover — and it timestamps arrivals, which matters when a guest disputes when they got there.
Worked example
$180–$300 installed. Auto-expire the code at checkout and a guest cannot come back for the phone charger three days later.
Taught in Locks, Sensors and Cameras