Question 1

What is the difference between different model numbers:  eg. 508341,  504576 508342?

Accepted Answer

All 3 models are working almost the same as sound quality. The difference is the extras accesories in the model packages and PC compatible in the UC models.

1. Sennheiser Presence Grey Business: (508341) - Dual Connectivity, Single-Sided Bluetooth Wireless Headset for Mobile Device & Softphone/PC Connection. NO USB DONGLE - NO CAR CHARGING ADAPTOR - NO CARRYING CASE. COME WITH JUST THE USB CABLE CHARGER

2. Sennheiser Presence Grey UC (508342) - Dual Connectivity, Single-Sided Bluetooth Headset for Mobile Device & Softphone/PC Connection - WITH CARRYING CASE - USB DONGLE - USB CHARGING CABLE.

3. Sennheiser Presence UC (504576) - Dual Connectivity, Single-Sided Bluetooth Headset for Mobile Device & Softphone/PC Connection - WITH CARRYING CASE - USB DONGLE - CAR CHARGING ADAPTOR - USB CHARGING CABLE - Compatible with Major UC Platform Compatible.

I bougth  Sennheiser Presence UC model 504576 for reason it came  with all the accessories needed and working with most PC features

Question 2

Bluetooth version

Accepted Answer

Yes. Connects to your phone by bluetooth.

Question 3

How do I keep from closing the boom while in my pocket? Effectively turning it off.

Accepted Answer

I keep mine in my pocket when working in the warehouse. It connects so quickly when you slide the boom out that I've never missed a call. I just did a quick test and from the time I pulled the boom out until it was fully connected and ready to answer a call was less than 2 seconds.

Question 4

When connected to 2 devices simultaneously, how do you switch between them?

Accepted Answer

it is automatic, the phone takes priority during a call over say your computer. if you are talking about between two phones then it would be like a conference call. I recommend answering the 2nd call without the Bluetooth.

ASIN	B07M59BBKG
Additional Features	Lightweight, Noise Cancellation
Age Range Description	Adult
Audio Driver Type	Dynamic Driver
Battery Average Life	10 Hour
Battery Charge Time	1.2 Hour
Best Sellers Rank	#256,199 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #734 in Single Ear Bluetooth Cell Phone Headsets
Bluetooth Version	5.0
Brand Name	EPOS
Built-In Media	PRESENCE™ Grey Business headset, USB charging cable, ear hook, 4 x ear sleeves, safety guide, quick guide
Cable Features	Without Cable
Color	Grey
Compatible Devices	Compatible with two mobile Phones, or a Cell phone & PC, to allow for seamless transitions between connected Bluetooth devices
Connectivity Technology	Bluetooth
Control Type	Call Control
Customer Reviews	4.0 4.0 out of 5 stars (1,007)
Earpiece Shape	In Ear
Enclosure Material	Plastic
Frequency Range	150 - 6,800 Hz
Global Trade Identification Number	00615104320802, 04044155243031
Headphone Folding Features	In Ear
Headphone Jack	usb
Headphones Ear Placement	In Ear
Is Autographed	No
Item Type Name	Business headset
Item Weight	13 Grams
Manufacturer	Sennheiser
Model Name	PRESENCE™ Grey Business
Model Number	PRESENCE™ Grey Business
Noise Control	Active Noise Cancellation
Number of Items	1
Number of Power Levels	5
Style Name	Grey without Bluetooth dongle
UPC	840064404600 615104320802
Unit Count	1.0 Count
Warranty Description	2 year manufacturer
Water Resistance Level	Not Water Resistant
Wireless Technology	Bluetooth

Sennheiser Presence Mono Bluetooth Earphone, Black

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