K Ring: formerly known as Kerv Ring – find out more

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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 Ringfind 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

Black Ocean

White Ocean

White Ocean

Black Fire

Black Fire

White Fire

White Fire

Black Jet

Black Jet

White Jet

White Jet

Black Sun

Black Sun

White Sun

White Sun

Black Moon

Black Moon

White Moon

White Moon

Black Candy

Black Candy

White Candy

White Candy

Black Leaf

Black Leaf

White Leaf

White Leaf

No charging

No charging icon
Unlike smartphones and smartwatches, K Ring never needs charging, so you'll always be able to pay

No pairing

No pairing icon
K Ring works all by itself, so you don't need to pair it with a smartphone to make a payment

Scratch resistant

Scratchproof icon
Engineered from zirconia ceramic, K Ring’s outer shell is hypoallergenic and almost as scratch-resistant as diamond

Waterproof

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!

testimonials_icon_email.pngAndrea, London, email

Getting used to clench fist - touch Oyster reader - open barrier - get on tube

testimonials_icon_twitter.pngSteve, London, Twitter

If I forget to wear my ring, my day gets a lot more inconvenient – especially on the Tube

testimonials_icon_email.pngKaren, London, Email

Used mine in Germany and the guy behind the counter made me show it to his co-workers

testimonials_icon_twitter.pngRaymond, Reading, Twitter

It worked perfectly. You’re not having it back it’s gorgeous!

testimonials_icon_twitter.pngAndrew, Hampshire, Twitter

No more searching the saddle bag at the coffee stop – I just pay with a fist bump!

testimonials_icon_twitter.pngNigel, Hertfordshire, Email

News as it breaks

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