20 Most Recent Plantronics CS55 Wireless Headset - Page 4 Questions & Answers

Click to download manual: https://www2.plantronics.com/media/media-resources/literature/user_guides/explorer-500_ug_en.pdf Reinstall the app.

If it is the internal CMOS battery, it should be an easy swap. There is a high potential that this will reset the radio settings and you will lose all saved channels/frequencies, and have to reprogram them. Cell size is usually a CR2032 or CR2032R. The R is for the rechargable version, but not all equipment will do that. If it isn't a black socket that you can easily pop batteries in and out of, you may have to buy one with solder tabs or wires already attached. I don't reccomend trying to solder directly on the battery because it can fail and even expload from the heat.

Your order number is irrelevant to anyone except Plantronics Support and the vendor, and you should not quote it to anyone but them.For anyone to help you, you need to make an effort yourself. e.g. Instead of stating you 'need help', read all the product's manuals, take the installation steps suggested, and then state specifically what your problem is.These pages may help you:https://www.plantronics.com/us/en/support/product

https://www.plantronics.com/us/en/support/downloads-apps

https://www.plantronics.com/content/dam/plantronics/documents-and-guides/en/user-guides/explorer220-ug.pdf

Click on https://www2.plantronics.com/media/media-resources/literature/cordless_mobile/voyager-legend_ug_en-us.pdf

They are available on Amazon and eBay.

https://headsetplus.com/blog/how-to-get-rid-of-echo-of-a-plantronics-wireless-headset/

Pretty certain it is programmable. You need to take the manual and follow the steps. Model number would help a lot for better advise . If you cannot get them to work, call the place you ordered them from.