Hallo Herr Nachbar,
the SoundBridge remotes are interchangeable, so yes, an M1000 remote will work with an M2000.
You can also use universal remotes, for example a Logitech Harmony or one of the OneForAll devices.
It's also possible to control the SoundBridge with a smartphone.
SoundBridge M1001 and M1000 • Clint L1 (retired) • DNT IP-dio (retired)
Google Chromecast • Amazon Fire TV • Amazon Echo and Echo Dot