Get accurate measurements of DCC, DC and AC volts and amps on your layout with these meters. Units are rated at 10 Amps and measure true RMS Volts/Amps, ± 2%. Compatible with all scales, adjustable contacts permit direct track voltage measurements no batteries are needed for use with DCC systems. Use as a portable troubleshooting tool, or mount on control panel or fascia rear screw terminals allow for easy connection to layout wiring.