K Ring: formerly known as Kerv Ring – find out more
As seen on
Look who's rockin' a K Ring
To celebrate our rebrand, we've teamed up with Capital's Summertime Ball with Vodafone to help spread the word – read more
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?
Black Ocean
White Ocean
Black Fire
White Fire
Black Jet
White Jet
Black Sun
White Sun
Black Moon
White Moon
Black Candy
White Candy
Black Leaf
White Leaf
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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