Model Number: DL150/lw0323 Brand Name: Eoutil Key Specifications/Special Features: DL150 LCD Digital Angle Finder Meter Protractor Spirit Level .1. 45cm 18-inch level2. Resolution: 0.01° at 0°-1° and 89°-90°, 0.05°at the rest3. Horizontal level measuring range: 0 to 360°4. Horizontal level accuracy: ±0.1° at 0° and 90°, ±0.2° at the rest5. Working range angle: 0 to 230°6. Angle accuracy: ±0.57. Measures angle in degrees, IN/FT, % slope or pitch,mm/m8. Audible tone at level, plump
9. Automatic shut-off after 3 minutes
10. Backlight LCD
11. Self checking accuracy
12. Self calibration
13. Hold-function to freeze the measurement
14. Operated by a 6F22 9V battery(not included)