Product Information: Product Name: Digital Inclinometer Measurement Range: 4*90 Resolution: 0.1 Power Supply: 3V CR2032*3 Working Temperature: 0°C~40°C Product Packaging: Cardboard Packaging Relative Humidity: 40% ~ 80% Weight: 110g / 130g (total weight) Reference Point: Horizontal Plane Dimensions: 51*51*26mm Mini Digital Protractor Long press "ON/OFF" for 3 seconds to turn on the protractor. The "UNIT" key changes between degree and percentage. "CAL" switches between absolute and relative mode; press "CAL" to enter relative mode, then press and hold "CAL" for 4 seconds to return to absolute mode. The "HOLD" function saves the measurement value, ensuring accurate readings. Strong Magnetic Base and LCD Display The base features three magnets, allowing secure attachment to steel surfaces. The device has a large LCD display for clear and quick readings. The display automatically inverts when the unit is upside down. Zinc Alloy Shell Designed with a zinc alloy shell, this digital protractor offers improved heat dissipation, water resistance, moisture resistance, and a durable, sleek appearance. Convenient to Carry Lightweight and compact, this magnetic protractor is easy to carry and ideal for use on ladders, roofs, or other elevated or unstable work areas. Wide Application This digital angle finder is ideal for carpentry, construction, and various DIY projects. It is suitable for measuring angles for fitting installations, shelves, cabinets, picture frames, roof pitches, windows, doors, and more.