Technical data “Unit weight 380 g (with battery)” “Dimensions 31.0 x 13.0 x 9.0 cm” “Power supply 1 x 9 V battery, type 6F-22” “Battery low indication automatic” “Power input about 17 mA” “Measurement control single chip microcomputer” “Estimated working time on one battery pack about 24h” “Display LCD display 3.5 digits” “Measuring range 10-990 units” “Measurement resolution 10 units” “Recommended storage temperature from 5°C to 45°C”