In addition to knowing where the voltage is, TonTesT ® lets you hear it change, know which way it's changing, and recognize disturbances that your meters haven't been showing you.

Some Professional TonTesT ® users are actually calling back customers and locating electrical problems that they couldn't solve before.

It works fine in those dark and physically cramped places. You don't need a third hand to hold it in your face like a meter.

Tool improvements can make more money for you. Just like your air wrench, TonTesT ® is faster and reduces effort. Just one less customer sent away, or one less 'under estimate' can pay for a TonTesT ®.

By understanding the changing pitch of TonTesT ®, you'll improve your knowledge of electrical flow; tone is more 'intuitive' than numbers or traces. Having more knowledge builds your career and your income.

TonTesT ® is new, but for the seasoned professional, the learning curve is surprisingly short. You'll quickly learn the good and bad sounds of components in the circuit, and zero in on problems. Join the others who are 'breaking new trails' of electrical testing. Check out the 'Sounds' page, then let's get you started.