.Besides an adapter you can charge your Sonos Controller with Sonos Charging Cradle. It can be bought at list price of $39.99. Charging Cradle Package Contains Cradle, Cradle bracket, 2 drywall anchors, 2 anchor screws for wall-mounting and Sonos Charging Cradle Setup Guide in English, German, Dutch, Swedish, French and Spanish. Charging Cradle comes in Light gray/ High quality PC grade color. It weighs just 7.1 oz. (200 g). The Charger Cradle does double duty, it charges your Controller when it’s at rest, otherwise mount it on the wall (custom-fit bracket, anchors and screws are included) or place it on a table.