Portable ETCR1000D Large Caliber Non Contact 3 Phase Sequence Detection Phase Detector Meter Condition: Item Type: Non-Contact Phase Sequence Detector Material: ABS Color: As shown in the picture Product Non-contact phase detector Functions Phase detection (normal phase, reverse phase and phase deficiency), live wire examination, simple power detection, breakpoint location and line maintenance Power Supply DC 3V 2 x AA batteries (LR6)(Not included), continuously working for 70 hours Voltage Range AC 70～1000V, 45～65Hz (Sine Wave Continuous Input) Clamp Wire Size Diameter: 10-40mm / 0.4-1.6in LED Display Positive Phase Sequence: The four phase-sequence lamps blink in order (clockwise). Negative Phase Sequence: The four phase-sequence lamps blink in order (counterclockwise). Line-voltage Indication: L1, L2, L3  lamp light up. Default Phase: L1/ L2/L3  lamp is off. Open Circuit: L1/L2/L3  lamp is off. Buzzer Positive Phase Sequence: The instrument emits intermittent short beeps Negative Phase Sequence: The instrument emits a continuous long beep Battery Check After the power is turned on, the POWER indicator is on: The battery is low. The LOW BATTERY light is on. Auto Power off  After 5minutes, the meter automatically cut off power supply. Meter Dimension 70x74x30mm/2.8x2.9x1.2in Clamp Lead Length 0.6m/2ft Net Weight 256g/9oz Working Temperature and Humidity -10℃～55℃; below 80%rh Storage Temperature and Humidity -20℃～60℃; below 90%rh Maximum Measured Voltage AC 1000V Dielectric Strength 5.4kVrms Maximum Rated Power 300mVA