Function & Calibration Setup: Built in magnet provides stable attachment to metal surfaces Enter calibration mode by pressing RESET during startup—displays " CAL1 " for Compact size ( 5.8X5.8X2.5Cm) and lightweight design secure high portability Data Hold & Battery Alert: Secure your measurements with data hold function and get alerts for low battery Auto shut off after 3 minutes of inactivity helps preserve battery life Comes with a small tool for easy battery replacement Accurate Measuring Tool: Provides workshop accuracy with ±0.1 0.2° Tolerance and 0.05° Resolution Proposals up to 4 90° measuring capability with reset preferences ( absolute / relative), data hold, and unit conversion ( ° /%), great for wood projects, home renovations, and construction areas Rechargeable Digital corner Finder: Features built in rechargeable battery for continuous usage, eliminating frequent battery changes Perfect for woodworking specialists, construction planners, and hobbyists with accurate measurements for proper shaping and corner alignment Includes a handy storage bag for easy transportation Clear LCD Display: Equipped with LCD screen for excellent visibility in low or brilliant lighting conditions Automatically inverts readings when flipped, allowing easy viewing from multiple angles, Manufacturer: Oxxggkao