Bluetooth communication allows remote monitoring of electrical system status using the Surge Guard Wireless LCD Remote Display (item #118088).The Southwire Surge Guard provides total electrical protection for your 50-amp RV, including protection against wiring issues, low/high voltage and frequency, and elevated ground line current. This surge protector includes patent-pending Load Side Open Neutral Protection that detects and protects your RV from the catastrophic results of an open neutral in a 50-amp RV electrical system. Ten-second start-up sequence and 128 second fault delay sequence protect compressor motors against damage. A security ring on the cord lets you lock the Surge Guard to prevent theft. Comes with Progressive Industries Limited Lifetime Warranty with Connected Equipment Coverage. Features• LCD Text Display• Low (136V) Voltage Protection• Low/High Frequency Protection• Open Ground Protection• Open Neutral â Line and Load Side• High Neutral Current Protection• Elevated Ground Line Current Protection• Reverse Polarity• Designed for Outside Use• 10-Second Startup Delay Load side open neutral protection 10-second start-up sequence 128-second fault delay sequence | Southwire Surge Guard Portable 50-Amp 120/240-Volt Bluetooth-Capable Surge Protector