The Kerv smart ring may well replace a wallet with cash and credit cards. The author of the project positions the gadget as the first ring in the world for making contactless payments. The ring is made of a waterproof, durable, scratch-resistant material from which tooth crowns are made and does not require recharging. Kerv is powered by NFC technology. The gadget owner will be able to make payments of up to $ 46 – to pay for the purchase, just bring the ring to a payment terminal that supports contactless payments. Neither bank cards, nor PIN codes, nor a smartphone are needed. Information about all payments made is reflected in the proprietary application on the mobile device. Note that funds are debited from the account opened on the Kerv secure website. The user can always replenish the balance from his bank account. The developers assure that the ring is reliably protected from cloning and hacking, like their website. The gadget is perfect for cyclists, athletes, visitors to beaches, pools and so on. As part of the Kickstarter Kerv ring can be purchased for 25 English pounds.