Welding Passivation Tester Range -0.55 to +1 Display Digital Visual/Audible Indicators Display Screen Data Storage Connects With PC Via USB Cable (Included) Output 9 V Length 9 in Width 6.7 in Height 2 in Features Allows End-Users To Keep Secure Records Measures The Protective Chromium Passive Layer On Stainless Steel Surfaces Provides An Instant Reading To Verify The Quality Of The Protective Layer Small Probe Allows Testing In Hard To Reach Areas