Yes, the VW is quite sensitive, almost as good as an ocilloscope. That is why it is such a valuable trouble shooting tool, it gives you an indication of a problem that a voltmeter or loaded voltmeter will never show. You can get a momentary drop in voltage at the receiver bus that will never show up on a voltmeter, whether loaded or not, that can cause a brown out on a 2.4GHz system. Another great thing about the VW is that it is always connected making it so easy to check at the end of each flight before turning off your receiver to make sure the battery voltage is sufficient for one more flight or more. I see to many people that never take the time to check with a loaded VM before each flight due to the trouble of getting it connected and reading it. Nothing more useless than a meter that is never used.