https://www.sonos.com/en-us/shop/sonos-combo-adapter
Combo Ethernet & Aux Line-In Adapter | Sonos
This split adapter allows you both to connect Era 100, Era 300, or Move 2 to your router over Ethernet and connect a line-in audio source over 3.5mm aux.
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https://www.sonos.com/en-us/shop/turntable-set-pro-ject-t1-turntable-era-100-black
Turntable Set with Era 100 and Line-in Adapter | Sonos
Stream all your favorite audio content and play your favorite vinyls when you connect the Pro-Ject T1 Phono SB Turntable to Era 100. Shop this set at Sonos.
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