QSI ACS-730 PowerGuard Surge Protector For O-Gauge Trains

What PowerGuard Does:

• Protects on-board electronics and train control systems from damage caused by transformers sending excessive electrical noise, over voltage or voltage spikes to the track
• Shows track voltage and relative strength of the horn and bell signals
• Helps trace transformer or on-board system problems
• Solves hardware compatibility problems between Lionel's Cab-1 walk-around throttle and other systems
• Works with all AC output transformers
• Easy 2-wire hook-up.
• Strong metal case
• Dimensions: 4" X 2" X 1-3/4"

This unit has been used on a layout. It is in Like New condition and we have tested it to make sure that it is in working order. Includes the instructions and box.