Do they enclose the ears or press against them? I can't tell how big they are.

With a center hole inside the padding of only about 1 & 3/4's inches around, these do not come close to enclosing my ears.

Will this headphone jack fit through the headphone jack on my iphone 5s life proof case?

Fits fine through my Otterbox Defender (iphne 5S)

Down the road, will 2-inch-diameter replacement foam earpads fit these Panasonic headphones?

I just measured them & they're actually oval, not circular. Approx dimensions are 2.25 x 1.75, so they're more than 2" at the longest dimension. You could try them, but more than likely, won't fit. Perhaps Panasonic sells some?

Will these work well outside brisk walk or running with an iPod?

We only use these on a computer, so I'm not sure how they'll function with movement. I can see them maybe working on a brisk walk, but they might be shaky for a run.

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Description

🎧 Elevate your everyday audio—light, clear, and always connected.

ON EAR STYLE - Sleek on-ear design balances comfort and portability, making it your go-to for work, travel, or downtime.
FOCUSED LISTENING - Built-in noise cancellation lets you dive deep into your music or calls, blocking out distractions in busy environments.
FEATHERLIGHT DESIGN - At just 34 grams, these headphones feel like a breeze on your ears—perfect for all-day wear without fatigue.
UNIVERSAL COMPATIBILITY - Plug and play with any device featuring a 3.5mm jack—TV, PC, or smartphone, your soundtrack follows you everywhere.
INTUITIVE VOLUME CONTROL - Easily adjust your audio levels on the fly with integrated remote control—no fumbling, just seamless sound.

The Panasonic RP-HT21 wired on-ear headphones combine ultra-lightweight comfort (34g) with universal 3.5mm jack compatibility and noise cancellation technology, delivering immersive sound for professionals on the move. Designed for adults seeking reliable, distraction-free audio without the hassle of batteries or wireless pairing.

Specifications

Headphones Jack	3.5 mm Jack
Model Name	RP-HT21
Connectivity Technology	Wired
Included Components	Headphones - wired
Age Range (Description)	Adult
Material	Plastic
Specific Uses For Product	personal
Compatible Devices	TV, PC, Cellphone
Control Type	Volume Control
Item Weight	1.2 Ounces
Customer Package Type	Standard Packaging
Net Quantity	1 Headphone
Style	On Ear
Control Method	Remote
Number of Items	1
Cable Length	4.5 Feet
Earpiece Shape	On-Ear
UPC	163120595181 379882590528 182682341180 037988259052 100177326832 132017749488 689076738811 805095870770 804066527064 809185306859 069060216189 115970817241 012301986938 088037945464 112840387064 012307101014 675903999548 617407404531 012303529904 742996787564 808111645451 809385156292
Special Feature	Noise Cancellation
Global Trade Identification Number	00012301986938, 00037988259052
Manufacturer	Panasonic Consumer
Model	RP-HT21
Model Year	2009
Batteries	1 Lithium Ion batteries required.
Item model number	RP-HT21
Special Features	Noise Cancellation
Compiler	Panasonic
Microphone format	without microphone
Batteries Included	No
Batteries Required	No
Battery cell composition	Lithium Ion
Adapter	Panasonic
Reader	Panasonic
Form Factor	Over Ear, On ear
Marimba	Panasonic
Recorder	Panasonic
Transcriber	Panasonic
Does it contain liquid?	No
Includes Rechargeable Battery	No
Includes remote	No
Manufacturer	Panasonic Consumer
Item Weight	34 g

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