offers 4 important measurements: pH Value, Temperature, Moisture, and Environment Sunlight Intensity. ... 1 soil moisture, pH, temperature and light tester offers 4 important measurements: pH Value, Temperature, Moisture, and Environment Sunlight Intensity. ... )Power supplyOne 9V block battery Automatic offThe unit will be automatically off after 5 minutes disabling.Operating temperature+5C~+40CSizeMain ...