The Clamp on Tester has been designed to detect, indirectly, AC/DC current and frequency. The Clamp on Tester has one LED integrated to allow for the point of measurement to be illuminated, and a function to test the voltage without contact. The reduced dimensions of this device allow for measurements to be taken in places with limited access. The backlight display ensures that it is easy to read, even in places with limited light available, such as electrical cabinets or in cabling ducts. Testing voltage without contact helps when detecting dangerous power lines, and it makes it easier to detect the location of cuts in power lines.