This is the PawPort: a smart motorized pet door that slides onto your existing pet door frame and can be controlled with Alexa and Google Assistant. It combines with a waterproof, rechargeable Bluetooth collar tag. Pawport opens slowly when your pet is close. You can adjust sensitivity level in the Pawport app.
The app also lets you set curfew times, track entry/exit and control multiple doors. You can even set a different schedule for different pets.