Finally a cat flap that works
This is the third type of microchip flap that we've bought.
The 1st one only worked when connected to mains power. The 2nd one would only open from the inside, so our cat was stuck outside.
This cat flap keeps our little escape artist inside when it's locked.
He had a bit of difficulty to start. The reader takes a short time to read the microchip before it opens the door. He is used to it now.