How many hours dose it last on a single charge?

At least 16 hours, sometimes longer. Assuming 8 hours asleep if left on cradle they will never lose charge. And if you forget to place them on the magnetic cradle overnight, just open the earmuff and put a couple good AA batteries in there (you could use alkaline or regular NiMH recharable). If you put in NiMH rechargeable batteries, then the magnetic stand will charge them as perfectly as the AA batteries that ship with the headphones. If you use alkaline AA, they work perfectly too but don't recharge and might overheat if you try to recharge them.

Why does this new range of models look like something from the 80s?

As someone else also said... with proper design, "form follows function." I honestly can't imsgine why the person asking this silly question asked it as he/she/it did, except to try to "pose as kewl." Sennheiser is one of the best makers of headphobes on the planet. And their design, while certainly nice looking, is never designed to "look kewl," first and foremost. They design for FUNCTION. And allow form to come later. The very fact that this set has great sound reproduction with easily-accessible controls seems to be what our friend here is calling "1980s design." And if putting functionality (including comfort and ease of use) above, say, "lighted plastic bands," then... by that definition, "1980s design" is vastly superior!

Does this receive 2 ghz or 5 ghz transmission?

It is actually 2.4 to 2.48 ghz. I stay in a double storey house and my base unit is on the ground floor. I can be anywhere in my house and the headset is able to receive the transmission signal without any problem at all. I am very happy with the RS 195 and would strongly recommend it.

ASIN	B00SJ4INFI
Age Range (Description)	Adult
Audio Driver Type	Dynamic Driver
Batteries	1 Lithium Polymer batteries required.
Battery Life	18 Hours
Best Sellers Rank	#6,766 in Electronics ( See Top 100 in Electronics ) #282 in Over-Ear Headphones
Cable Feature	Without Cable
Charging Time	18 Hours
Compatible Devices	Television
Connectivity Technology	Wireless
Control Method	Push Button
Control Type	control
Customer Package Type	Standard Packaging
Customer Reviews	4.2 4.2 out of 5 stars (8,216)
Date First Available	January 21, 2015
Earpiece Shape	Over-Ear
Frequency Response	22000 Hz
Generation	1
Global Trade Identification Number	00615104228436, 00615104338524, 04044155078282, 04044155248883
Hardware Interface	Radio Frequency
Headphones Jack	3.5 mm Jack
Included Components	RS 195 Wireless Over-Ear Headphone System with Selective Hearing Boost
Input Device Interface	3.5mm audio jack, optical (digital)
Is Discontinued By Manufacturer	No
Item Weight	3.5 pounds
Item model number	RS 195
Manufacturer	Sennheiser
Material	Plastic
Model Name	RS 195
Noise Control	Active Noise Cancellation
Noise Control Features	active_noise_cancellation
Number of Items	1
Product Dimensions	9.3 x 5.9 x 11.6 inches
Series Number	195
Special Feature	Volume Control
Specific Uses For Product	Music
Style	RS 195 Wireless Headphones
Supports Bluetooth Technology	No
UPC	615104228436 615104338524
Unit Count	1.0 Count
Water Resistance Level	Not Water Resistant
Wireless Communication Technology	RF

Consumer Audio RS 195 RF Wireless Headphone Systems for TV Listening with Selectable Hearing Boost Preset,Black

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