Beware of new Chinese ESC that is translucent blue in color and cheaper than most others.This ESC claims 300 amp capability and easy pushbutton setting.First of all, there is NO pushbutton on this unit! It does not come with any instructions so you have to guess how to program this thing! No matter how I tried,I could not get it to set right and the unit "stutters" at mid range! Not a good thing for your motor or gears! The Chinese seller does not respond to questions about programming or defects.Spend a few more dollars and get a better quality ESC and avoid this unit!Note: since I wrote this guide seller has changed ad and no longer claims it has pushbutton setup but still refuses to answer any questions about programming!This unit is junk-do not waste your money!