Review on RJ9 Telephone Headset Dual W/ Noise Cancelling Mic For Yealink, Avaya, Grandstream & More - Quick Disconnect (602QY1) by Kevin Gray

So my company switched phone providers and went from an older Cisco unit to a Polycom VVX410 model. The information on the Wantek headset says it will only work with the listed phones/models. Mine of course is not one of them. I looked up options for headsets certified for the Polycom VVX410 and the cheapest I could find was $75.00. Now I cannot see spending that much for a monaural headset, so I tried this one. When plugging into the phone directly audio from the phone pays well but everyone I spoke to with it said it was very hard to hear me. I was about to send it back when I remembered there are three additional RJ9 adapters that were included with the headset. Nothing in the instructions mention them at all either. At first glance they all look the same, except each is marked with a 1,2, or 3 on the grey plug. After closer inspection I noticed that the pin-out on each was different. Surprisingly I found that adapter #2 works perfectly. Audio is crisp and clear, and the mic comes across strong and no more issues of people complaining they cannot hear me.Over all this is a good headset. It's not as comfortable as my old set but it's far better than holding the handset to my shoulder while I type. Build quality seems to be good and the volume/mute button is conveniently close to grab it easily. Bottom line if you buy these and it doesn't work straight out of the box, make sure to try each of the adapters that they send with it. Chances are one of them will work.