Question 1

How is series 2 different from series 1

Accepted Answer

Thank you for your question. QuietComfort 35 headphones II offer the same unmatched combination of acclaimed noise reduction technology, wireless freedom, audio performance, dual-microphone system and 20-hour battery life as QuietComfort 35 headphones. However, QuietComfort 35 wireless headphones II also have a new Action button on the left earcup. In countries where the Google Assistant is available, that button gives you instant access to the Google Assistant, your own personal Google. In countries where the Google Assistant is not available, it lets you quickly toggle through three different ANR settings for optimal performance wherever you go. We hope this helps!

Question 2

When using them for a call, do you need a mic on a cord or do the headphones have a built in microphone to pick up your voice?

Accepted Answer

Hi, thank you for the interest in the QC 35 Series II headset!
You do not need an additional inline cable with a microphone. To confirm, the headset has the mic built into the earcup and is active when on phone calls. 
Hope this helps! Thank you

Question 3

i work on trains with loud noise it excess of 90 db.   with these headphones work in that environment???

Accepted Answer

Human hearing is very fragile.  Noise levels above 85 dba for extended periods can be harmful to your hearing.  Human hearing on average can't distinguish changes in sound pressure level  less than ~3db.  A 5db change, up or down, is clearly noticeable and a 10db change, up or down, will be perceived as a doubling or halving of the volume respectfully.  If the unit does not provide specifications on noise reduction across a band I would not use as hearing protection in a noisy environment.   There are bluetooth enabled over the ear muffs, or in the ear buds that provide greater than 20 db of noise reduction.

Question 4

how long does the battery last if you turn off the noise cancellation (wireless)?

Accepted Answer

Hello, thank you for your question. When the headphones are turned on and being used wirelessly, you will get up to 20-hours of battery life. If you turn off the headphones while they are being used wirelessly, this turns off both the Bluetooth and noise-cancellation. With the headphones turned on and the backup audio cable connected, Bluetooth will be disabled however you will get up to 40-hours of noise-cancellation. We hope this helps!

ASIN	B0756CYWWD
Additional Features	Microphone Included, Noise Cancellation, Volume Control
Age Range Description	Adult
Antenna Location	Music, Phone Calls, Podcasts
Audio Driver Type	Balanced Armature Driver
Battery Average Life	20 Hours
Battery Charge Time	20 Hours
Best Sellers Rank	#42,541 in Electronics ( See Top 100 in Electronics ) #1,082 in Over-Ear Headphones
Bluetooth Version	4.1
Brand	Bose
Brand Name	Bose
Built-In Media	QC35 headphones II^ charging cable^ Backup audio cable^ Carry case
Cable Features	Detachable, Without Cable
Carrying Case Weight	0.01 Pounds
Color	Black
Compatible Devices	iphone, ipad, android devices
Connectivity Technology	Bluetooth
Control Method	Voice
Control Type	Voice Control
Customer Package Type	Standard Packaging
Customer Reviews	4.7 out of 5 stars 67,958 Reviews
Ear Placement	In Ear
Earpiece Shape	Over-ear cups
Enclosure Material	Faux Leather, Glass-filled Nylon, Stainless Steel
External Testing Certification	No
Form Factor	Over Ear
Frequency Range	[20 Hz - 20,000 Hz]
Global Trade Identification Number	00017817770613, 00017817789127
Headphone Folding Features	Over Ear
Headphone Jack	USB
Headphones Ear Placement	In Ear
Headphones Jack	USB
Is Autographed	No
Item Weight	8.32 ounces
Manufacturer	Bose Corporation
Model Name	Quietcomfort 35 II
Model Number	789564-0010
Noise Control	Active Noise Cancellation
Number of Items	1
Series Number	35
Specific Uses For Product	Music
Style Name	35 Series
Theme	Video Game
UPC	820148577697 017817770613 017817789127
Unit Count	1.0 Count
Warranty Description	Please See Amazon Policy
Water Resistance Level	Not Water Resistant
Wireless Technology	Bluetooth

Bose QuietComfort 35 II Wireless Bluetooth Headphones, Noise-Cancelling, with Alexa Voice Control - Black

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