How to take screenshot on Maxwest Nitro 5.5

Brand: 
Maxwest
Model: 
Nitro 5.5
Instructions: 

1.To take a screenshot or screen capture with the maxwest Nitro 5.5  Press and hold the POWER button, and then press the VOLUME DOWNbutton and hold it for one or two seconds.

2. In principle, all the same - you'll see a message in the notification bar and find the resulting album screenshot gallery.