Specification: Model ETCR1000C Functions Phase detection (Positive phase, reverse phase and phaseloss), Live wire examination, Simple Power detection, Breakpoint location and Line maintenance. Power Supply DC 3V2AA Alkaline dry battery , Continuously working for 70 hours AC Voltage Range(V) AC 70 - 1000V, 40/65Hz (Sine Wave Continuous Input) Clamp Wire Size External Diameter 1.6-16mm LED Display (Positive Phase Sequence) The four phase-sequence lamps light in order (clockwise). (Negative Phase Sequence) The four phase-sequence lamps light in order (counterclockwise). (Live Power)L1,L2,L3 lamp light up in the voltage setting range. (Phase Loss) L1 or L2 or L3 does not light. (Short Circuit)L1 or L2 or L3 does not light. Buzzing (Positive phase) The instrument emits intermittent short beeps; (Reverse phase) The instrument emits a continuous long beep. Power On Indication Power on indication light turns on; Low power, low battery light on Magnetic force Four magnets on the back of the meter, which are attached to the distribution box and can withstand 800g quality. Auto Power off After 5 minutes, the meter automatically cut off power supply. Meter Dimension Width, height, thickness 70mm75mm*30mm Clamp Lead Length 0.6m Weight 317g Package list: