... more than 5s3. Adopting inset crystal hardware clock circuit, with temperature compensation circuit to ensure under the normal working conditions, ... peak load, day hour, low load energy, etc. LCD display recycled. After energy meter connect electricity, date, time, current ... than one pulseMax. Operation Temperature-30°C ~ +70°CMax. Storage Temperature-35°C ~ +75°CRelative Humidity≤85%Dimension 228 x ...