Shinwa Sokutei Digital Angle Meter Mini with Magnet 76447

Measurement range: 90° x 4 directions (360°) Minimum display: angle 0.1°, slope 0.1% Accuracy:+-0.2° Power supply: 9V dry battery x1 Continuous use time: Approximately 40 hours (when using alkaline) Auto power off: about 5 minutes