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I always assumed it took less battery power to play folk music than rock and roll, but never had the proof. Until now!
Oh no! You didn’t let your image finish uploading!
Got a pair of yellow and black in my bag of crap and i really like them. 
Maybe the rock songs are longer?
(expanded instrumentals?)
So these are worthy of a BOC. 
What about folk rock? Always a nice option when you’re putting in those 50 hours long days.
I just got a pair in my boc too 
Jealous of the BOCs. It’s been a long time since my last, and a pair of these would have been great! Ausom were some of the first Bluetooth headphones I ever owned when Bluetooth headphones were relatively new. They looked and sounded great. The foam ear cups and headband begin to disintegrate after a year or so of solid use, but at this price who cares. Just bought the Beats Studio Pro, and I’ll take a pair of these for comparison. When I’m done I’ll pass them on to a coworker in need. I doubt the noise cancellation will be sufficient where we work, but having something over our ears is better than nothing.
I got these to replace the godawful iBasics ones from December, and I’m very impressed thus far.