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Firstly by similar testers you mean testers with similar connectors and two rows of LED with a switch. Our testers only use high quality connectors. Although the testers do have two rows of LEDs and a switch they are not just wired to a battery. Each tester has a microprocessor controlling each LED in the tester. The switch is not just a rotary switch linking LEDs to a battery. The test switch simply tells the microprocessor to move on to the next step. At each step the microprocessor reads all the connections found and stores them temporarily. At the end of the test these results can be stored more permanently to be used as a reference against which cables can be checked very quickly. All our Audio testers can be put into intermittent test mode where the tester keeps repeating the test rapidly looking for any sudden shorts or opens. All our testers are made in the United Kingdom. |