Testo 755-1 Current/Voltage Meter with 200A AC, 600 V AC/DC, and Continuity Testing Breadcrumb Home / Products / Parts / Tools and Instruments / Testing Instruments / AC Safety Volt Checks Loading... Customer Part Number: 0590-7551 Brand: Testo Temp. Range (°F): 14 - 122 Operating Voltage: 6-600