General description The 1-225°/400 mm/16 inch digital display angle ruler is an essential tool for precise angle measurement in various DIY and home improvement projects. It features a practical design with a HOLD button to lock angles and a hanging hole for easy storage. This digital protractor is ideal for measuring angles in applications such as decks, sloping roofs, and alignment tasks performed by carpenters. Technical specifications Measuring Range: 0 to 100% Angle Measurement: 0 to 225° (vertical and horizontal) Measuring Accuracy: 0.5° Power Supply: 9V 6F22 battery (not included) Automatic Shutdown: After five minutes of inactivity Usage This digital angle ruler is designed for measuring precise angles and can be used in various applications, including: Deck construction Roof sloping measurements Carpentry alignment tasks Other information LCD Display: Features a data storage function for saving measurement results Low Battery Alarm: Alerts when battery is running low