Features: - One person enough to complete cable continuity check - Checks wiring error in 5E, 6E, coaxial and telephone line - Such as open circuit, short circuit, jumper wire, reverse connection or cross-talk interference - Locates the wiring or connection error - Measures cable length and determines the distance of open circuit and short circuit - Dynamically calibrates cable length and makes length measurement as accurate as 97% - Simple and easy use, big screen to display test clear - Portable unit with long battery life (wait-case 50 hours) - Automatically time-delay shut off - Measures length and pair with or without far-end recognizer - Locates cable and there are 8 far-end passive test jacks (ID no.: ID1 - ID 8) - Far-end recognize with prompting voice - Self-checking function and automatically compensates any change in battery capacity or ambient temperature - Single board computer software watchdog design and reliable operating.