Ah ok. I’ve applied for the MuchBetter card and fob so will see what the internals of that look like when opened up. I suspect it’ll be bigger than the images you put up tbh as they’ll maybe not have gone to the expense of miniaturising it
Just to be clear… you are getting a keychain which is larger than the implant. this is to comply with EMV performance requirements for wearables. we extract the chip from this keychain and put it onto a new smaller antenna carrier PCB. then we encapsulation that with biopolymer to make it safe for implantation. performance is reduced of course, but i don’t think anyone would be willing to implant a full size keychain to retain performance.