2 
1 Device turn off automatically after 15 seconds
I charge it more than 20 hours but it still appear red light on headphone.
A lot of time i turned on and connected to bluetooth with my phone but every single time it turned off automatically after 15 seconds.
When I connected to any device through aux cable it works but i can not use it on battery.
It is brand new just opened the box and that is it.
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