This is a first time I use such device. Overall I didn't like it at the moment. For those who need it anyway I will suggest to look for the following features:1. device powered while the button is pressed and unpowered while it's released. This way it would be much easier to control like an electric drill.2. mode switch and power buttons should be much far from each other. On these model there are very close and very often when I try to power off it I just switch the mode instead.Cheers to everyone.
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