Question 1

Are these authentic Sennheiser even from a third party?

Accepted Answer

That's a difficult, essentially impossible, question to answer accurately. I highly doubt there is anyone or any group that has verified the authenticity of the product from every third party seller. Furthermore, any such answer or report would be a snapshot in time — new third party sellers could appear, unscrupulous third party sellers could change and start selling counterfeit products after the report, some third party sellers might be selling a mixture of authentic & counterfeit products (possibly without malice and without knowledge of that fact) and whoever is doing the verification would randomly get one or the other and the report would only be partially accurate, meaning the verification wouldn't be a guarantee that any given order would get what was reported.

The best thing to do is to buy from authorized dealers & retailers. If you're buying from a third party here on Amazon, then it's upon you to do the research to verify that seller's reputation and whether or not Sennheiser (or the manufacturer of other products) has authorized them to sell their products.

Question 2

can these be used while wearing glasses?

Accepted Answer

No.  These are very uncomfortable if you wear glasses.  Besides, I have moved away from Sennheiser products.  They are very lousy in providing firmware updates.  Their products do not work with Windows 11 due to firmware incompatibilities.  Their Technical Support told me to downgrade to Windows 10 (a very lousy answer.)

Question 3

Does it have dedicated mute button?

Accepted Answer

The Sennheiser IE 80S BT does have a mute function. 
To mute the headphones during a call, press the multi-function button for 2 seconds. The microphone will be muted and you will hear a voice prompt “Mute On”
To continue the call and reactivate the microphone press the multi-function again until you hear the voice prompt “Mute Off”

Question 4

Is this uc (unified communications) capable?

Accepted Answer

This is clearly a playback-focused setup. While it allows simultaneous pairing to two devices, I don't think it is UC-certified.

ASIN	B07WWKH1B7
Additional Features	Microphone Included, Noise Isolation, Universal Phone Control
Age Range Description	Adult
Audio Driver Type	Dynamic Driver
Battery Average Life	6 hour
Battery Charge Time	1.5 hour
Best Sellers Rank	#455,290 in Electronics ( See Top 100 in Electronics ) #6,486 in Over-Ear Headphones #14,991 in Earbud & In-Ear Headphones
Bluetooth Version	4
Brand	Sennheiser
Brand Name	Sennheiser
Built-In Media	IE 80S Earphones; Detachable Bluetooth ® Neckband IEN BT ;Ear Adapter Sets (S/M/L): Silicone/ Lamellar/ Comply™ Memory Foam ; Bass Adjustment and Cleaning Tool ; USB Charging Cable (Types C to A); Carry Case
Cable Features	Neckband
Carrying Case Color	Black
Carrying Case Material	Case
Color	Black
Compatible Devices	Smartphones, Tablets, Laptops, Smart TVs, Desktops, Gaming Consoles, Car Audio Systems, Music Production Equipment
Connectivity Technology	Bluetooth
Control Method	App
Control Type	control
Controller Type	Application-based
Customer Package Type	Case
Customer Reviews	3.9 out of 5 stars 375 Reviews
Ear Placement	In Ear
Earpiece Shape	Rounded Tips
Enclosure Material	Silicone
Form Factor	In Ear
Frequency Range	10 Hz - 20 kHz
Frequency Response	20000 hertz
Global Trade Identification Number	00615104315198
Headphone Folding Features	In Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	In Ear
Item Type Name	Bluetooth In-Ear headphones with neckband
Item Weight	1 ounces
Manufacturer	Sennheiser
Model Name	IE 80S BT
Model Number	508240
Noise Control	Sound Isolation
Number of Items	1
Number of Power Levels	1
Sensitivity	110 db
Series Number	5
Specific Uses For Product	Fitness
Style Name	Modern
Subject Character	no character
Theme	No Theme
UPC	615104315198
Unit Count	1 Count
Warranty Description	2 year manufacturer
Water Resistance Level	Water Resistant
Wireless Technology	Bluetooth

Sennheiser Consumer Audio IE 80S BT Audiophile In Ear Bluetooth Headphone, Black

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