250/400MM 0-225 Degree Digital Angle Ruler Detector Aluminum Alloy Electronic Protractor Level Measuring Gauge Meter Inclinomete      Description: This digital angle finder, with LCD display and blue back-light, it is able to see the measured record under many circumstances. This wide measurement range(0-230°) and high precision(±0.5°) angle gauge makes you work with efficiency and comfort.What's more, it is simple to transfer the miltre angle for your mitre/slide saw by pressing the MITER key. The shell of the protractor is made of aluminum, which is strong and durable, suitable for the complicated working environment.                   Features:       1.Measuring Range and High Accuracy: With 0-230° of measuring range, 0.1° of increment, ±0.5°       (9mm/m) of accuracy, allow you to measure angle precisely and quickly.       2.Mitre Gauge Function: It is also used as a mitre angle calculator, transfers the miltre angle for your mitre/slide saw.       3.Distinct LCD Digital Display: With blue back-light screen, able to read the data clearly even under dark circumstance.       4.Readout Frozen and Auto Power Off: The hold function of readout offers you great convenience when working. After 5 minutes of no operation, the unit would power off automatically, for extending the battery life.       5.High Quality Material: Made of aluminum, which is strong and durable.       6.Easy Operation and Wide Applications: As a quick protractor , is an ideal DIY tool for remodeling houses, door andWindows installation and much more.            Specifications:       Material: Aluminum       Measuring range: 0-225°       Measuring accuracy: ±0.5°       Increase/decrease angle: 0.1°       Spirit Levels: Horizontal and vertical bubble levels       Working temperature: 0°C~-50°C       Battery: 9V 6F22 (Battery is not included)       Item Size: 46x5x2.3cm (18.1x2.0x2.3in)       Item Weight: 420g(14.8oz)            Package Included:       1x Digital Angle Finder       1x Bag       1x English User Manual                                                                   Upgraded version picture