Wow... First I think this one for sale looks awesome, and durable. Second...I love these meters with it built in...Very cool!
Third...Yeah, folks should have and know how to use a multi-meter anyway, these testers are a nice luxury, but there may be times when you have to chase down where a short or open is located, or your little box dies...I built my own too...I use 2 rechargeable AAs.
U can spend like... 5 bucks and get a converter for charging that USB! Vape On!