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