The NCE DCC Meter/Analyzer allows you to analyze the voltage, amperage and signal packets on your system at the track level. It features simple hookup and easy connection to the track. Meter Features: DCC voltmeter function measures up to 25 volts DCC. DCC Amp meter function measures up to 11.5 Amps. Packet Analyzer Features: View DCC packets sent by the command station on a computer screen. Selectively filter out idle, reset, accessory, function, and or speed packets Opto-isolated to prevent ground loops from the DCC system to the computer. Powered from the track, no extra power supply needed. Display in Hex or Verbose mode Additional Requirements: PC/Mac/Linux computer USB cable The DCC Meter/Analyzer is part of the extensive line of NCE DCC products.