SHINWA Digital Vernier Caliper 150mm Slide Caliper Metric Machinist 19979 Japan Outside Measurement, Inside Measurement, Depth Measurement, Gap Measurement Has an on/off switch with auto-off, to save battery life Comes with a protective case Power : 1 x 1.5v SR44 (silver oxide cell) battery (included) Material : Carbon Fiber Size : 237mm X 77mm Weight : 56g Made in China (Shinwa Rules Dalian LTD.)