In RC engineering it's always important to have a digital multi-meter in the field with you ! Before you connect a 5v device to 12v by accident you can check the voltage first ! Accuracy is vital for LiPos - a small reliable RC DDM for single handed checks, is hard to find. We at MultiWiiCopter.com use and recommend these particular UT118A Pen DMM meters ourselves. It will easily pay for itself if it saves you from a single crash from false assumption. Its no good having a 200 dollar fluke at home when you need to check your electronic drone at the field !
Excludes printed/hardcopy instruction sheet - see photo section above for instruction manual & video below