ACCURATE MEASUREMENT - digital LCD display for easy reading Accuracy 0.3 Resolution 0.05 Relative and absolute angle measurement Hold and zero function MULTIFUNCTIONAL MEASUREMENT - Combined with a ruler and a sensor 'stainless steel angle. measuring angle and length (metric and imperial) Hinge mechanism on angle ruler allows full 360 degree measurement inside and out RESETTING & Holding- Takes with button reset to zero any angle for relative measurement Hold button to hold angles any time Auto shut off after 6 minutes of inactivity EASY READING - Easily readable LCD screen displays results One-shot accurate measurement with data retention feature. POWER SAVING - Automatically shut off after five minutes to extend battery life with low power alarm.