Klein Tools Digital Clamp Meter, AC Auto-Ranging 400 Amp with TempThe CL220 measures AC current and NCVT via clamp and AC DC voltage, resistance, and continuity via test leads, and temperature with thermocouple. The meter features automatically ranging True Root Mean Squared (TRMS) measurement technology for accuracy. Additionally, a backlit LCD makes viewing in low light easy. Clamp Meter measures AC current and NCVT via clamp and AC DC voltage, resistance, and continuity via test leads, and temperature with