Worth mentioning it's best to check that your cats chip is compatible with …Worth mentioning it's best to check that your cats chip is compatible with the cat flap as I think it's this manufacturer that was not suitable with my cats microchip and had to choose another one.
They all are now. (according to the company)
We've rescued a number of small dogs from Europe and they are all recognised.
Have one in a glass door , our cat can come and go and it keeps others out.
Sureflap also offer decent service too, the door flap on ours started to split so they sent us a free replacement flap to fit.