I’ve used a mini nut in the past.
Work just fine with the Bluetooth binding and work up to a 10m distance. I used to have one in my car so that it got detected when I arrived in the drive. The problem with it is that it is only 10m distance and sometimes I park on the road so it doesn’t detect it.
I changed to putting it on a key fob but when I put my keys in the drawer it lost signal…so I ditched using them this way.
They work perfectly well if the pitfalls don’t matter to / affect you