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 “비트코인구매☆『텔레-coin2002』𓇊가상화폐환전✼비트코인세탁☉가상화폐환전√” from Slim Down Your Wallet with a Card That Does the Work of Eight Credit Cards

Search “비트코인구매☆『텔레-coin2002』𓇊가상화폐환전✼비트코인세탁☉가상화폐환전√”

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.