The?Takei 5404 Extension D Digital Backward Flexmeter?is a digital display type measuring instrument to examine the backward flexibility of the body, designed to display the larger value in two measurements performed for each subject. Features Measuring range: 10.0 to 80.0cm. Minimum measurement unit: 0.1cm. Display: LCD in 3 digits. Automatic stop: Approx. 1 min after the final measurement. Power source: Lithium cells. Life of each cell: Approx. 5,000hr. Dimensions: Approx. 160W ? 172D ? 817Hmm. Weight: Approx. 0.6kg.