Coin uses a low-power Bluetooth signal to communicate with the app. If you ever leave your Coin behind while buying coffee, your phone will receive a notification asking whether you left without remembering to take your card. A phone is not required to use the card, however.  Search “이더리움세탁✞「텔레-coin2002」가상화폐현금화이더리움송금☂비트코인현금화⍻☼𓇊” from Slim Down Your Wallet with a Card That Does the Work of Eight Credit Cards

Search “이더리움세탁✞「텔레-coin2002」가상화폐현금화이더리움송금☂비트코인현금화⍻☼𓇊”

Coin uses a low-power Bluetooth signal to communicate with the app. If you ever leave your Coin behind while buying coffee, your phone will receive a notification asking whether you left without remembering to take your card. A phone is not required to use the card, however.