The SC66 is the top Fieldpiece clamp meter among HVAC/R instructors. It"s a manual ranging DMM that includes the electrical ranges students and technicians use for most HVAC/R work, plus temperature, capacitance and DC current - all for a low price. It also has several safety features like a high-voltage LED and beeper, a continuity warning, push button non-contact voltage (NCV), a lead holder on the clamp, and MAX hold so you can concentrate on the test point, hook up, and see the results after you"ve disconnected. Instructors and their students tell us they like the fact that it is a manual ranger so they have to think about what they"re hooking up to before they do it. They also like that the SC66 is just the right amount of meter for residential techs just starting out.