Total waste of money
This mouse is absolutely not worth it.
The DPI buttons feel like they make almost zero difference, the movement and scrolling are not very smooth, but worst of all - I have already been through 2 full batteries because there is no way to turn this mouse off.
When your laptop is closed/hibernating the mouse keeps waking it up too.
So, not only does the mouse keep moving and draining it's own battery (for e.g. when it's in your laptop bag being carried around) but it keeps waking my laptop up and has killed the laptop battery a few times too.
I've tried various Windows settings too and none seem to make a huge difference.
In short, rather spend a bit more and get something worthwhile. Learn from my mistake so you don't have to spend twice.