Description:Current Setting : 500mACurrent Selection : Rotary switch selector; Phase Start Selection : Referenced to EarthOver temperature Protection : Yes (3 sensors); Phase Polarity Trip Indicator : Yes (LCD) Referenced to EarthOperating Voltage (L-E) : 1812EL-A 240 Voltmeter (L-E) : 20 Vac - 280Vac; Timer Resolution : 1mS (Max time = 2.999s)Timer Accuracy : 1mS±1mS;  Current Accuracy : ±5% ±1mA; Voltmeter Resolution : 1Vac; Voltmeter : ±2% ± 1VacOperating Temperature : -5°C to 45°C; Storage Temperature : -10°C to 85°C18 x 16 x 10 Centimeter • 2 Lines x 16 Characters L.C.D • Low power consumption • Microprocessor Controlled • Menu Driven • Accurate Digital Readout of Disconnection Time. • Automatic Data Hold function.