2 in 1 Digital Angle Finder - Measure not only length but also 360° angle (inner angle, outer angle). Locking Function Use locking screws to lock both feet in the desired position or angle. Large 1" LCD Display - LCD with electronic digital display, you can switch between degrees and minutes with the "°/"" button "HOLD" button stores data during measurement, "ON/OFF/Zero" button resets data to zero by short pressing any angle; Corner locking button for any angle. Length, Width, and Precision - Length measurement: 400mm; measuring angle: 000.0° ~ 999.9°; precision ; ±0.3°; resolution: 0.1°; measuring range: 0-360°. The ruler is forged from high-quality stainless steel, ensuring quality, corrosion resistance, and durability. Excellent Quality - Premium stainless steel forged scale is laser engraved (mm and inch scale), wear-resistant and corrosion-resistant. High-Quality Service - If you have any questions about usage, installation, and product, you can contact customer service at any time. We will solve the problem within 24 hours. The ruler may be a little sharp, please wear gloves when using it. Features: Length: 200mm / 8"" Material: Stainless Aluminum Working Range: 0-360° Angle Precision: ±0.3° Operating Temperature: -10° - 50° Dimension: 28.7*11.18*2.779 cm Average Battery Life: 000h Weight: 300g Battery: 3V CR2032 "battery