To illustrate the function of storage expansion for battery doorbells.

To 2K Battery Doorbell

1. The provided HomeBase has 16GB built-in eMMC storage. It cannot be upgraded.
2. The battery doorbell can also work with the Gen-1 eufyCam HomeBase, which comes with a 16GB microSD card and the user can upgrade it to 128GB.

To 1080P Battery Doorbell

The provided Wi-Fi doorbell chime can be inserted into a microSD card(Up to 128GB).

If you have any questions, please contact us for further assistance.