Linking
Link Nunchuk
The ERA spells this app Nunchuck in its list; the app itself is called Nunchuk.
Steps
Part 1: On the ERA
On the wallet screen, tap the settings icon (sliders) > Link. See Open the Link menu.

ERA: Wallet settings. On the wallet list, swipe up to the second page and tap Nunchuck.

ERA: Wallet app list. On DOWNLOAD Nunchuck, tap the store for your phone: IOS or ANDROID.

ERA: Download Nunchuck. On the store page, tap NEXT. If Nunchuk is not on your phone yet, scan the store QR with your phone first.

ERA: Download Nunchuck from Google Play. Swipe up to the last page of CONNECT Nunchuck.

ERA: Connect Nunchuck. Tap SHOW QR.
QR FOR LINK appears. Leave it on screen.

ERA: QR for link.
Part 2: In Nunchuk
The device shows these steps; they are repeated here.
Open Nunchuk and, on Home, tap Add key.
Image coming soon — Phone screen — Nunchuk Home with the Add key buttonPhone: Nunchuk Home.
Tap Keystone > Continue.
Tap Scan QR.
Point the phone camera at the ERA screen and hold still until the key is added.
Image coming soon — Phone screen — Nunchuk Keystone scanner reading the ERA link codePhone: Scan QR.
On the ERA, tap DONE. The device returns to the wallet SETTINGS.
Done
Nunchuk lists a new key from the ERA (Native SegWit, Taproot and Nested SegWit paths), and the ERA is back on SETTINGS.
Trouble?
Nunchuk asks which address type to use → pick the one that matches the ERA DEPOSIT address (bc1q… = Native SegWit); see Supported chains.
Scanning never completes → see Linking problems.