Fluke 28 II Industrial Multimeter operates with precision in a multitude of environments to troubleshoot most electrical problems. This meter has a IP 67 (waterproof and dustproof) rating, MSHA approvals (pending), lengthy functioning temperature range of -15 degrees Celsius to +55 degrees Celsius (5 degrees Fahrenheit to 131 degrees Fahrenheit , -40 degrees Celsius for up to 20 minutes) and 95% humidity, and have been designed and tested to withstand a 3 meter (10 foot) fall.