K Ring: formerly known as Kerv Ring – find out more
Introducing Realtime PIN Delivery
If you're planning on using K Ring abroad, you may be asked for a PIN – find out how to get yours now
Switched on Auto top-up yet?
With Auto top-up you’ll never have to worry about running out of funds on your K Ring – find out more
Always on hand
Carrying a wallet or purse isn’t always practical, so we made K Ring, the world's first contactless payment ring.
Now you can leave your wallets, purses, cash, coins and cards at home and still pay for stuff – anywhere that accepts Mastercard® contactless payments – no PIN, signature, bank account or smartphone required.
Always looking good
Available in a range of sizes, K Ring is engineered from scratch resistant zirconia ceramic and comes in 14 colour combinations.
Which will you choose?
No charging
Unlike smartphones and smartwatches, K Ring never needs charging, so you'll always be able to pay
No pairing
K Ring works all by itself, so you don't need to pair it with a smartphone to make a payment
Scratch resistant
Engineered from zirconia ceramic, K Ring’s outer shell is hypoallergenic and almost as scratch-resistant as diamond
Waterproof
K Ring’s electronics are sealed with a waterproof hypoallergenic resin, and it's just as happy in the sea as it is in the shower
Always welcome
K Ring is welcome anywhere that accepts Mastercard contactless payments, which is almost 40 million retail locations worldwide – just look out for the contactless payment symbol
Always secure
For extra peace of mind, you can switch your K Ring on and off, set restrictions and get live transaction alerts – all managed within your K Account
It was so easy!
Andrea, London, email
Getting used to clench fist - touch Oyster reader - open barrier - get on tube
Steve, London, Twitter
If I forget to wear my ring, my day gets a lot more inconvenient – especially on the Tube
Used mine in Germany and the guy behind the counter made me show it to his co-workers
It worked perfectly. You’re not having it back it’s gorgeous!
No more searching the saddle bag at the coffee stop – I just pay with a fist bump!
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