The Electronic Hook Switch (EHS) Cables work with the Spracht ZuM Maestro DECT Headsets (HS-2018/HS-2019). The EHS-2013 EHS Cable works with Polycom Phones and allows users to answer/hang-up calls remotely directly from the Headgear. It also eliminates the need for a Headset Lifter. Also works with Jabra Desk Phone Wireless DECT headsets.