diff --git a/packages/launchpad-ledger/README.md b/packages/launchpad-ledger/README.md
index 9b547645..4cd9ca24 100644
--- a/packages/launchpad-ledger/README.md
+++ b/packages/launchpad-ledger/README.md
@@ -2,6 +2,33 @@
 
 [![npm version](https://img.shields.io/npm/v/@cosmjs/launchpad-ledger.svg)](https://www.npmjs.com/package/@cosmjs/launchpad-ledger)
 
+## Supported platforms
+
+We use the
+[@ledgerhq/hw-transport-webusb](https://github.com/LedgerHQ/ledgerjs/tree/master/packages/hw-transport-webusb)
+library to connect to Ledger devices from the browser via USB. You can check the
+support status of this library
+[here](https://github.com/LedgerHQ/ledgerjs/tree/master/packages/hw-transport-webusb#support-status).
+
+## Running the demo
+
+Build the package for web:
+
+```sh
+yarn pack-web
+```
+
+Host the `launchpad-ledger` package directory, for example using Python 3:
+
+```sh
+python3 -m http.server
+```
+
+Visit the demo page in a browser, for example if using the Python 3 option:
+[http://localhost:8000/demo]().
+
+Then follow the instructions on that page.
+
 ## License
 
 This package is part of the cosmjs repository, licensed under the Apache License