The Awesome New KKCOBVR Q3U 10,000Mah BATTERY COOLING HEADSTRAP WITH BACK OF HEAD & NECK FAN, & PALM TOUCH ACTIVATED DETACHABLE, MAGNETIC FRONT OF HEAD/FOREHEAD/FACE FAN. This is the best Headstrap yet, & blows away any of the battery powered Headstraps with a fan out there, or better yet, just better than any Headstrap to this dare Period. It’s super light for all of its features, including the newest feature only it has to this date, it’s back of head/neck fan. The front of head, forehead/face fan is magnetic & detachable, even though I don’t know why you’d want to detach it cause it weighs about the weight of a soda cap, not even exaggerating. It activated by the touch of your palm after the whole unit is turned on by pushing the electronic dial located underneath the bottom back of the headstrap. When the fans are activated, the back of head/neck fans have 10 power levels. There’s 3 FANS ON THIS THING!!! It’s kinda crazy. It powers your headset for an extra about 3&1/2 hrs I tested with my own with it set down & a movie playing on repeat in the background. I don’t use headphones so I really can’t comment on that, but if you do & don’t use Bluetooth the headphone jack is there. All I know is this is the best headstrap I’ve ever owned to date & if I didn’t have my own & an extra, I wouldn’t be letting go this 3rd one I have. It’s constantly out of stock & back in stock day to day. So if you want to get yours you can get it here. I’ll post more of them as they sell. Don’t really have a need to sell them so I’m not really wanting to list them all to go at once. They’re definitely worth every penny. I hope you get yours if you want one :) Thanks for looking!