Is this accurate to 0.1 deg or 0.05?

According to the information on the Klein Website this is accurate to ±0.1° from 0° to 1°, 89° to 91°, 179° to 180°; ±0.2° at All Other Angles

Can you set this to 0 then find angle on table saw blade if table saw is out of level?

Yes, it measures relative angles, zero it on your saw table and it will accurately measure the angle you need.

Anyone get an error on start up?

tilted or out of range may trigger error

Can this determine the pitch (1/12, 2/12, 3/12....12/12, 13/12..etc.)??? Need to determine pitch angle for roofing, pipes...etc?

As said below, you can use it to calculate pitch indirectly. A 12/12 pitch is 45 degrees, zero the inclinometer on the top plate along the same plane as the trusses then transfer it to the truss. The measurement displayed will be the angle between the plate and the top of the truss. Most speed squares have the rise over run angle printed on them, if not: Roof Pitch = (1 ÷ Tangent (Rise ÷ Run))*180/π

ASIN	B07ZWW3BW5
Best Sellers Rank	#91,910 in Home Improvement ( See Top 100 in Home Improvement ) #22 in Electronic Levels
Brand	KLEIN TOOLS
Brand Name	KLEIN TOOLS
Colour	Orange
Customer Reviews	4.8 out of 5 stars 15,535 Reviews
Global Trade Identification Number	00092644692376
Item Dimensions L x W	6L x 5.6W Centimeters
Item Weight	3.5 Ounces
Manufacturer	Klein Tools
Material	Aluminium , Metal
Material Type	Aluminium, Metal
Operation Mode	Automatic
Product Dimensions	6L x 5.6W Centimeters
Style	Magnetic
Style Name	Magnetic
UPC	092644692376
Unit Count	1.0 Count

Klein Tools 935DAG Digital Electronic Level and Angle Gauge, Measures 0 - 90 and 0 - 180 Degree Ranges, Measures and Sets Angles

Details

Description

Specifications

Reviews

Common Questions