Durable Protractor: Stainless steel digital angle finder with laser-etched measurements for clear readings. Digital LCD display provides easy-to-read results and eliminates guesswork. High Accuracy: Measures with an accuracy of ±0.3 degrees. Measuring range: 0–360°. Folded length: 8" / 200mm. Total length: 15" / 400mm. Save Data and Reverse Measured Value: Press "HOLD/Rev" during measurement to save data. Long press "HOLD/Rev" to reverse the display for easier reading. Two-in-One Design: Combines a ruler and protractor for measuring both length and angle, offering convenience for various measurement tasks. Note: Stainless steel has sharp edges. Use with care and keep out of reach of children. Material: Stainless steel. Total length: 400mm. Measuring range: 0–360°. Resolution: 0.05°. Accuracy: 0.3°. Requires 1 x CR2032 3V lithium battery (not included). Package Content: 1 x digital angle finder, 1 x user manual. Excellent Locking Function: The tight/loose button operates smoothly, allowing adjustment to the desired tightness. Zero Button: Allows easy zeroing for simplified measurement using positive or negative angles. Etched Gauges: Laser-etched scales ensure long-lasting, clear readability.