20 By listening to our customers as they prepare and react to power outages, we’ve developed this innovative group of electrical CIRCUIT TESTERS. We designed them to make generator transfer switch installation as well as everyday electrical jobs easier and safer. CIRCUIT TESTERS & HOME MONITORING PRODUCTS Our storm-related HOME MONITORING PRODUCTS warn you of power outages and home flooding, alert you to accidental power interruption to important plug-in devices and even phone you anywhere if the temperature in your home or cabin approaches freezing.