How to take screenshot on Vodafone Smart speed 6

Brand: 
Vodafone
Model: 
Smart speed 6
Instructions: 

Make screenshot in the Vodafone Smart speed 6 with shortcut keys:
Once you have the content on the screen capture should perform simultaneously combining the power button + volume down button for two seconds. Then you can see on the screen flash, indicating that the catch was taken. Now you will receive a notification when reviewing find the screenshot made with the option to edit or delete it.