# How to buy bKai

bKA can be purchased in a round of Contraction status, and you must have KAI assets in your wallet.

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[How to buy KAI](/kai-protocol/english/how-to-guides/kai-protocol-service-guide/kai.md)
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## Buy bKai

\*bKAI can be purchased with KAI in Contraction rounds.

1.Connect your wallet on the Kai protocol site and approve the bKAI item.

![](/files/-MkuhWtrK2eaU29MfHRu)

2\. When you click the \[Buy bKAI] button on the Kai Protocol site, a purchase pop-up appears.

![](/files/-Mkuix1jt1jQuc6vDXpl)

3\. Enter the KAI quantity within the buyable bKAI and click the \[Buy] button.

![](/files/-MkujFAhr-yuL4f3rzYp)

3\. When you click the \[Buy] button, the transaction proceeds and you can hold the bKAI token.

## Redeem bKAI

* There is no expiry date for bKAI and bKAI holders can claim in KAI at any time by redeeming them.\
  However, when redemption is requested in a reduced round, a 10% penalty is incurred because KAI is additionally distributed even though it is not at the time of additional supply.

1.Click the \[Redeem] button in the bKAI redemption menu.

![](/files/-MkulT5NPaoO9VOsbpn-)

2\. Enter the number of bKAI tokens to be redeemed among the redeemable amounts, and click the \[Redeem] button.

![](/files/-MkulbTDW-KmrT8-Ixxy)

3\. If you click the \[Redeem] button, the transaction proceeds and KAI tokens are supplied as much as the amount of redeemed tokens.


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