Electrical Management System (EMS) helps to protect your RV against voltage fluctuations, power surges and incorrectly wired shore power which can cause severe and costly damage to RV appliances and electronics. Improved design features include: state-of-the-art microprocessors, all weather shield assembly, rugged pull handle, secure locking bracket, built-in scrolling digital display and a tough Lean housing. Sleek, compact portable design makes unit easy to use and store. Plug-and-play application. Designed for recreational vehicle use only. Built-in Scrolling Digital Display: Previous Error Code (PE),Normal Operating Conditions (E 0), Reverse Polarity Protection (E 1), Open Ground Protection (E 2), Open Neutral Protection (no power through), High Voltage Protection (Line 1-E 3, Line 2-E 5), Low Voltage Protection (Line 1-E3, Line 2-E 6), High Frequency Protection (E 7),Low Frequency Protection (E 8), Provides Amperage Usage Reading.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov