Product Highlights Accuracy: 0.05° (0° to 10°), 0.1° (80° to 90°), 0.2° (10° to 80°) Battery Life 500 Hrs. Standard 9-Volt Battery Cross Axis Error: Minimal Output: RS-232C Compatible Repeatability: ±0.05° Resolution: 0.01° (0° to 9.99°), 0.1° (10° to 90°)° Storage Temperature: -20-65°C -4-149°F Weight: 295g 10.4oz Operating Temperature: -5-50°C 23-122°F Full 360° range (90° x 4). Machined aluminum frame. Alternate reference (zero). Reading hold. Simple calibration requiring no special fixtures