The SC line of current clamps is for the field service technician who wants to get the most out of the one meter he carries. The SC66 and SC67 are manual rangers. The SC76 is an autoranger that works with Fieldpiece accessory heads. The SC76 has more ranges and functions plus a bar graph. The SC77 adds a 4000 count display with backlight and TrueRMS. Non-contact Voltage Loud beeper and bright LED indicate the NCV tab is near AC voltages greater than 24V. Microamps For flame rectifier diode tests. Capacitance For motor-run and motor-start capacitors. And More Hi-voltage indicator you cant miss--both LED and beeper turn on to indicate youve touched a potentially dangerous voltage. Continuity indicated by LED and beeper. MAX hold automatically holds reading so you can look at the meter after youve disconnected. Low ohms ranges for motor windings and mid range for thermistors. Amps AC resolution to 0.01A for heat anticipator circuit (20A range). Up to 200AAC with 0.1V resolution