# subscriptionPeriodMillis · FT4 TypeScript client · Chromia Docs (concept)

> subscriptionPeriodMillis(): QueryObject<number> Creates a query object for the get_subscription_period_millis - query Returns QueryObject<number>

Source: https://docs.chromia.com/pages/ft4-ts-client/functions/registration.subscriptionPeriodMillis/

Function

# subscriptionPeriodMillis

* ```signature
  subscriptionPeriodMillis(): QueryObject<number>
  ```

  Creates a query object for the `get_subscription_period_millis` - query

  #### Returns QueryObject<number>

[View this page on docs.chromia.com](https://docs.chromia.com/pages/ft4-ts-client/functions/registration.subscriptionPeriodMillis.html)Generated API reference, mirrored from the live docs