The Southwire Remote Power Monitor Bluetooth Display, Model 40301, adds wireless remote access to your Southwire Surge Guard surge protector (Models 34931 & 34951). It automatically detects which model you have (30A or 50A) and provides detailed information regarding voltage, amp draw, frequency, kilowatt usage, current fault screen, fault log of previous 4 faults, and connection status. It has an operating range of 100 feet and includes the optional mounting bracket. This unit requires 3-AAA 1.5v alkaline batteries to operate (not included). Brand new, in stock and ready to ship.