Smallest most concealable Bluetooth FRS radio

FRS / GMRS Radios
1

I am looking for The Smallest most concealable Bluetooth FRS radio That I can Bluetooth to my earbud with microphone. This is for church security. Any help would be appreciated.

2

Buy Two Way Radios sells the Cobra PR562BLT. I know nothing about it but what I read on their website. It might be a good place to start. Cobra PR562BLT FRS Two Way Radio w/ Bluetooth (Single Radio)

3

This is the smallest one w Bluethooth we have. You would need to add a bluetooth Microphone Cobra PR561BLT FRS Two Way Radio w/ Bluetooth (Single Radio)