Welcome to use the cable fault locator (high anti-interference type). This product is a precision instrument, please don’t disassemble it privately to avoid affecting the warranty service. During the test, please do not connect the tester directly to the live cables. In order to avoid strong electricity entering and burning the meter. Keep in mind please! If there are any confusion for operating the tester, please contact the technical support staff in time. Our company will continue to improve this tester, and individual parts of the instrument provided may be different from the description in this manual, without prior notice.