The Fluke 87V MAX True-RMS Digital Multimeter defines a new standard for operating in extreme conditions, with the features and accuracy to troubleshoot most electrical problems, and withstands drops up to 4 meters (13 feet). It is a most rugged digital multimeter and built with an industrial strength case and a removable holster. The holster doubles as a test probe holder for one-handed operation.?This Fluke digital multimeter is fully waterproof and dustproof, to work reliably in all the places that you need to work, and has an extended operating temperature range of -40°C (for up to 20 minutes) to +55°C.