GEOGAUGE(R), OPERATING RANGE 17 TO 400 KILO POUND FEET PER CUBIC IN (3 TO 70 MN/M), DISPLAY LCD, POWERED BY (6) D BATTERIES, CHARGER INPUT VOLTAGE -, BATTERY LIFE 1000 TO 1500 MEASUREMENTS, COMPLIES WITH ASTM D6758, INCLUDES HARD CARRYING CASE, INSTRUCTIONS, MANUFACTURERS WARRANTY LENGTH 6 MO