https://sparkservices.net/store/snom/sno-ehs-ehs-wireless-headset-adapter-for-d7xx-3x
SNO-EHS EHS wireless Headset Adapter for D7xx/3x | SPARK Services
- Allows you to use a third party wireless headset system with any of your Snom 3xx, 7xx series phones- Works as an electronic hook switch so you can answer
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