“What is this item? All night we’ve been trying to solve this. It slides open and there is a tiny piece of fοam inside.”
Answer: “It’s a key fob for a programmable RFID entry system.”
I think it might be the 95th time I have seen that picture on this site, and yes, old toothbrush :)
Yeah, how could a sponge be used for RFID?
Yeah, Izi, we've been over this before.