Review on 🎧 WirelessFinest Headset Headphones with Volume, Mute Control Replacement for Cisco SPA Series Spa303 Spa504g and Other Models, Polycom Soundpoint IP 320 330, Grandstream, Cortelco by David Turner

It works great with my Cisco 303, I love how Wireless Finest packaged it and added extra spacers as advertised. Instructions are on the packaging. Please note that you need to reinstall the plug, some people complain that it doesn't work because they probably didn't insert the plug all the way. Also, call and test your cell phone to make sure that 1) you are pressing the headset button on your phone. 2) Make sure the button in the middle of the cable is in the ON position. 2) The volume button is adjusted so that you can hear the beep. Now you're done, just press the headset button to turn on the call.