Can anyone tell me what the difference is between the cold card and other air gapped devices. I dont really get it. It has a secure element just like some others. I have currently a trezor and a ledger where I am considering a cold card, but dont understand why owning one is better than the other two. Secondly, When you go to the coinkite store to purchase 1 cold card, does it come with the cable, power adapter, and SD card? Or do you have to purchase those separately? The site is not clear. Thanks
cold cards are a form of hardware wallet that secures your coins for you. It us distinct from other wallets in a sense that these are supposed to be air-gapped, which means they are completely shut off the internet and would require to be physically present and active to even be accessed, unlik most cold wallets of today. Of course. This is a double-edged sword in a sense that it completely prevents remote hacking and secures your coins, but also means that if you lose it. You'd have to say goodbye to your coins.
AFAIK most Cold Cards are bought along with its peripherals, so you should be good.