Why is there no way to contact them for warranty issues? Plenty of promises but no simple way to contact them.

That's because they don't work! DO NOT BUY THESE. I USED THEM AT THE RANGE 4 WEEKS AGO. I NOW HAVE PERMANENT HEARING LOSS AND CONSTANT RINGING. If I could find a way to sue the manufacturer in China I would

Does it fit a very large head?

I don't know what you call large. I wear a 7" hat. When I put them on, I pull them about 2" more than what my head size is. The also adjust up and down for ear location

I work in a production factory with constant noise. Will these block the loud sudden noises and the background noise or just the loud noises?

They block the loud noises. Only problem with this item is they are battery operated and they die quickly.

Is the only difference between the $69 and $89 mode the gels ear pads? Also what is the standard warranty on these muffs?

Yes, the only difference between the $69 and $89 mode is the gels ear pads. And PROHEAR provides ONE YEAR WARRANTY, if you have any problems, please feel free t contact us.

Item Weight	10.2 ounces
Product Dimensions	4.52 x 3.54 x 4.92 inches
Item model number	PROHEAR 030
Size	3.54 inches (width) x 4.52 inches (length) x 4.92 inches (height)
Color	Black
Style	Bluetooth Black
Material	Durable & solid ABS plastic, Ultra-soft ear cushions and headband
Pattern	Solid
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

030 Bluetooth Electronic Shooting Ear Protection

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