Down measuring ON/OFF switch(Battery not included) Metric / Inch system interchange at any position With data output interface Product Description Material: Plastic digital module, Stainless steel measuring head Quantity:3 pc Size: . 95mmx40mmx20mm/3.7 inch x1.57 inch x0.78 inch (LxWxH) Color: Grey + Black Specifications: Resolution: 0.01mm/0.0004 inch Measuring Range: 0-12.7mm/5 inch Power: One button battery (SR44/LR44) with work voltage 1.5V Operating temperature : 0℃ - 40℃ Storage temperature :-20℃ - 70℃ Relative humidity: ≤ 80% Package Includes: 3 PC X Portable Precise Digital Thickness Gauge Meter Tester Micrometer 0 to 12.7mm Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.