Testo 755 Series Current Voltage Testers - Testo 0590 7551, The Testo 755-1 current/voltage tester is fast and easy to use, especially when you are testing multiple circuits. The convenient open-jaw current tester automatically turns on when the voltage exceeds 6V. It then auto-selects the correct parameters and range for your test.The rugged tester is suitable for virtually all your daily electrical measuring tasks as it includes all the basic functions, e.g., current, voltage, resistance and continuity. An integrated flashlight enables users to work in poorly lit areas. The overall design is for convenient testing including interchangeable measuring tips which can be easily updated and maintained. A convenient lead holder is integrated into the housing for safe and easy storage. Testo 0590 7551 755-1 Current Voltage Tester