![Melvin on Twitter: "Hi @Sonos, I just bought The Arc, Sub (gen 3) and two One SL's. I have a question about the One's. I see on the internet that there are Melvin on Twitter: "Hi @Sonos, I just bought The Arc, Sub (gen 3) and two One SL's. I have a question about the One's. I see on the internet that there are](https://pbs.twimg.com/media/EoOV6u_W4AIGXO9.jpg:large)
Melvin on Twitter: "Hi @Sonos, I just bought The Arc, Sub (gen 3) and two One SL's. I have a question about the One's. I see on the internet that there are
![sean c on Twitter: "@SonosSupport Hey here is a pic of the serial number on the back, 1310 00-0E-58-BA-1F-5C-6 https://t.co/bEE86xokdw" / Twitter sean c on Twitter: "@SonosSupport Hey here is a pic of the serial number on the back, 1310 00-0E-58-BA-1F-5C-6 https://t.co/bEE86xokdw" / Twitter](https://pbs.twimg.com/media/DgcOQvMU8AApEDH.jpg)
sean c on Twitter: "@SonosSupport Hey here is a pic of the serial number on the back, 1310 00-0E-58-BA-1F-5C-6 https://t.co/bEE86xokdw" / Twitter
![Sonos update 12.1 brings a simpler set up, Alexa routine support & more - Smart Home Sounds | Smart Home Sounds Sonos update 12.1 brings a simpler set up, Alexa routine support & more - Smart Home Sounds | Smart Home Sounds](https://www.smarthomesounds.co.uk/wp/wp-content/uploads/2020/10/Sonos-S2-app-update-stereo-pair-1200x650.jpg)