Amazon.com: Sonos CR200 Wireless control of your Sonos Multi-Room Music System (Discontinued by Manufacturer) : Electronics
Sonos Control (Formerly the Controller 200) Wireless CONTROL B&H
The Sonos App: How it Works
Sonos Remote App for iPad | WIRED
Product Review - Sonos CR200 Controller 200 for the Sonos Music Server
Sonos will launch its new app and big S2 software update on June 8th - The Verge
Sonos controller with WeMo switch and Amazon Echo speech - Particle Projects
Menu Bar Controller App for Sonos Speakers Updated for macOS 11 - MacRumors
How to use it: your personal guide to Sonos app
Sonos CR200 Remote Controller ONLY FOR PARTS OR REPAIR 180501001260 | eBay
GitHub - Thyraz/Sonos-Kids-Controller: Software for self made touchscreen jukeboxes for kids. Supports Spotify streaming and uses Sonos for audio output.