How is the fit? Does it hurt the ear?

I find that these headphones do hurt the ears and are not adjustable. I sync these with my android and use them at my desk all day, they're also great for using around the house. But after a half hour or so they definitely pinch the back-top of my ears. Not so much that they're unusable but enough that I definitely can't call them comfortable. I'm keeping them because they work great and the price is phenomenal but I think I'll get a pair of over the ear for all day use. If you're a bigger guy you may want to do the same, or at least realize that they will not "break-in" over time. If they're uncomfortable when you get them, they will stay that way. Otherwise, great product.

do they work with kindle fire hd?

Yes. I just received them yesterday and used them with my Kindle Fire Hd 8.9" for watching a movie. They even pause and play the movie and control the volume!

Are these head phones rechargeable...

Dear Lauren,Thank you for your question about the BTH220 stereo Bluetooth headphones. The BTH220 headphones do have a rechargeable battery. The battery will last for 8 hours of playback, on a single charge.Please contact us at support@kinivo.com if you have any additional questions.Thank you, Kinivo Product SupportEmail: support@kinivo.comToll Free: 1-855-4Kinivo (1-855-454-6486)Live Chat: http://support.kinivo.com(Mon-Fri: 9am-5pm Pacific)

Are these headphones good for working out/lifting weights? Are they somewhat sweat resistant?

I have had these headphones for at least 3 years now and I use them for working out, mostly weight lifting all the time. I haven't had a problem with them when I'm lying on my back, doing plyo work, etc. In ear buds just don't work for me because I sweat too much and bouncing around at all causes them to fall right out. The one exception I've found is the YurBuds, but they are wired and these sound much better to me. They've also been very durable. I carry them around in my gym bag or purse all the time with no special care. They fold up pretty compactly. The screws are showing corrosion from all the sweat and the ear pads are showing some wear from all the use, but I think that's expected at this point. These have been my favorite headphone purchase ever and I've been through several!

Headphones Jack	Mini USB
Model Name	BTH220
Connectivity Technology	Wireless
Wireless Communication Technology	Bluetooth
Included Components	Cable, Protective Case, User Manual
Age Range (Description)	Adult
Material	Plastic
Compatible Devices	Blackberry, HTC, Samsung, iPhone, iPhone 5
Control Type	Call Control
Cable Feature	Without Cable
Item Weight	2.5 Ounces
Net Quantity	1 Count
Style	Over Ear
Control Method	Remote
Number of Items	1
Product Dimensions	12.7 x 12.7 x 12.7 cm; 70.87 g
Batteries	1 CR2 batteries required.
Item model number	BTH220-Bluetooth-Headset
Connector	wireless
Colour Screen	No
Compatible Phone Models	apple iphone 3gs, apple iphone 5
Hardware Platform	MP3 Player, Smartphone, Tablet
Operating System	android
Item Weight	70.8 g
Manufacturer	Kinivo
Country of Origin	USA

BTH220 Wireless Bluetooth Over The Ear Headphone with Mic (Black)

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