Plantronics/Poly Headset Serial Number & Date Code
How can I find the date code and serial number on Plantronics Headsets?
The Plantronics/Poly date code of your headset designates its date of manufacture, and it’s used to establish your warranty period. The date code is generally listed with your product’s model and part number, although this is not always the case. The date code consist of one letter and one number (i.e J7). The serial number starts with the letter S/N: (i.e. S/N: AB0-000)
There are various locations where you can find the S/N and date code: It can vary greatly from model to model and the age of the headset. Here are some example locations. You may have to look on all these locations to find it.
On the speaker (look on the inner part of the ear cup after removing the ear cushions):
On the Headband (on the inner part)
On the Microphone Boom Arm (inner part of the microphone)
On USB headsets, you can also find it on the in-line control unit
On the Wireless Adapters (USB dongle), the serial number is on the back of the adapter
Wireless Headsets, the serial number is located on the bottom of the base
On an amplifier base, the serial# is located on the back or bottom of the base.
On a cable (if it’s there, not all cables with s/n), you can see in on a tag on the cable.
See older Plantronics models and photo examples where to locate date code and serial number:
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Polaris Models ~ Plantronics P31 and P31N Mirage ~ Models Plantronics H41 & H41N
Tristar ~ On headset or QD ~ Models Plantronics H81 & H81N 
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