Item Type: Digital Protractor Material: Stainless Steel Color: As shown in the picture Size: Approx. 21.5x3.5x2cm / 8.5x1.4x0.8in Weight: Approx.210g/7.4oz Battery: 210mAh CR2032 Button Battery (Not included) Measuring Range: 000.0-999.9 Measurement Accuracy: 0.3 Resolution: 0.1 Application: Drawing/mechanical measuring instrument/indoor decoration measurement Working Temperature: 0~50 How to Use: Install the battery, turn it clockwise to tighten the moving ruler, and turn it counterclockwise to loosen the moving ruler. Put the tool on any surface, short press the ON/OFF button, and press the zero key to set it to 0. Package List 1 x Digital Protractor(Battery Not Included) 1 x English Manual 1. Please allow 1& 8209;2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1Large capacity standby with automatic poweroff function , use CR2032 button battery to work for more than 2000 hours (battery not included). 2Digital protractor is equipped with a large LCD display for easy reading, measuring range is 0~999.9, accuracy is 0.3, resolution is 0.1 32 in 1 digital protractor, digital stainless steel ruler and angle finder combo makes precise measurements. 4It allows complete 360degree measurement of internal and reverse angles. The protractor combines standard and metric scale scales. Relative and absolute angle measurement. 5The digital protractor angle gauge and angle finder durable stainless steel body can be used for a long time. With HOLD and RESET function, lasering engraving scale, clear and accurate, will not fall off. 6Convenient locking screw, by pressing the screw, the ruler can be kept at any angle. For maintain its accuracy and read it easily, angle finder could be locked at any angle.