GemOro SUREgauge XL DigitaL Pocket Gemstone Gauge Includes Case and Batteries Included: SUREgauge XL, High-Setting Attachment, 2 LR batteries, User Manual, Gem-weight/pearl estimating book and Zippered Carrying Case Measuring Range: 0-25mm/0-1 and Precision Accuracy: 0.01mm/0.0005 Three Measuring Surfaces to measure Mounted Stones, High-Set Stones, and unmounted stones and pearls LCD Display, Locking Screw, Slider, MM/Inch Button, Power On/Off Button,ZERO Adjustment Button and Battery Compartment Included are two LR44 Alkaline Batteries (357 Silver Oxide); Size of Gauge is 3.5" long x 2" deep x 0.5" high