- Precision 4x90° Digital Angle Measurement: Achieve accurate multi-angle readings with a precision of ±0.1° at 0° and 90°, and ±0.2° for other angles. Resolution is 0.05°. The unit can zero at any angle for quick comparisons, making it ideal for iterative setup in projects. - 4-Side Strong Magnet for Secure Placement: Powerful magnets on all four sides allow stable attachment to table saw cutters, metal surfaces, and various DIY tools. This enables slip-free measurements during cutting, leveling, and renovation tasks. The display automatically inverts for easy reading when the unit is mounted upside down. - USB-C Rechargeable & Long-Lasting Battery: The digital protractor includes a 340mAh rechargeable battery, fully charging in about 2.5 hours and delivering more than 7 hours of use. It provides low-battery alerts and automatically shuts down after 3 idle minutes to extend tool life. - High-Contrast Display for Any Lighting: The large black/green VA screen delivers clear readings in bright sunlight or dim workspaces, reducing eye strain and improving accuracy in varied environments. - Practical Use Scenarios: - Woodworking and cabinet making: set and verify precise miters, angles, and laps on furniture components; zero at any reference angle for quick comparisons during assembly. - Renovation and installation: align shelves, frames, and hardware with stable magnet-assisted positioning on metal surfaces or tool benches; easily read angles from any orientation with auto-invert display. - Metalworking and workshop tasks: check and match tool angles, verify level surfaces, and ensure consistent cuts or fittings across multiple parts.