... and Features ♦ Measurement function:1. Measure bidirectional active energy; (reverse energy is calculated as positive energy), and store its data ... the battery can continuously work more than 3 years. ♦ Display and surveillance 1. Large wide temperature (-30ºC--80ºC ... , peak load, day hour, low load energy, etc. LCD display recycled. After energy meter connect electricity, date, time, current total ...