Features 1、LCD electronic protractor digital goniometer, angle measuring ruler. 2、High accuracy and high resolution,widely used in various angles and horizontal measurement. 3、LCD display screen, clear and easy to read,easy to calibrate and return to 0. 4、Aluminum alloy material, practical and durable. 5、Use the power switch, any position measurement unit conversion, any position clearance. 6、An ideal choice for home decoration, machining, garden maintenance, teaching map drawing, biology, medical treatment, packaging and other fields. Specification Item Type:Digital Angle Ruler Material: Aluminum Alloy Battery: 9V6F22 Size: 250mm Measuring Angle Range: 270° Graduation Value: 0.1 Resolution Value: 0.1 Measurement Accuracy: ±0.5 ̇ Package List 1 x Digital Angle Finder