Smart Ring Kerv could replace wallet with cash and credit cards. Author of the project positioning a gadget,as is the world’s first ring for contactless payments. The ring is made of waterproof durable scratch-resistant material of which produced dental crowns, and do not require recharging. Kerv works on technology NFC. The owner of the gadget will be able to carry out payment of up to $ 46 – pay for the purchase enough to bring ring to the payment terminals supporting contactless payments. Do not need no credit cards or PIN-codes or smartphone. Information about all the committed payments reflected in the company’s application on the mobile device. Note that the funds are debited from the account open on a secure Web site Kerv. You can always fill up the balance from your bank account. Developers assure that the ring is securely protected from hacking and cloning, as their a website. The gadget is perfectly suitable for cyclists, athletes, visitors to beaches, swimming pools and so on..