The Megger DLRO100EB is a handheld, battery-operated earth resistance tester that offers unmatched accuracy and reliability in a compact and rugged design. Its unique features include: Automatic test lead compensation for accurate readings even with long test leads High-resolution, backlit display for easy reading in all lighting conditions Rugged construction for use in harsh environments IP54-rated for protection against dust and water* Compact and lightweight for easy portability