Feature: 1. Multifunction: Detects open phase and phase sequence using LED indicators and buzzer 2. Frequency Range: 20Hz to 400Hz; equipped with red, green, and yellow LED indicators and buzzer for clear signal feedback 3. Stable Performance: Fast, accurate, efficient, and reliable measurements; easy and safe to operate 4. High-Quality Material: Constructed from durable ABS material; lightweight, wear-resistant, corrosion-resistant, and designed for long service life 5. User-Friendly Design: Includes a dedicated test clip; securely attaches to the metal probe of the test lead and can be easily clamped for convenient measurement Specification: Item Type: 3 Phase Rotation Tester Material: ABS Model: SM852B Purpose: 3-phase AC measurement Measurable Frequency Range: 20Hz~400Hz Continuous Use Time: Up to 60 minutes at 200V AC, up to 4 minutes at 600V AC Package List: 1 x 3 Phase Rotation Tester 3 x Clip 1 x Manual 1 x Portable Cloth Bag Note: 1. This is high-voltage test equipment. Before use, inspect the device for damage. Discontinue use and perform inspection or repair if any of the following occur: A: Visible damage (e.g., cracks or damage to the housing, broken insulation on test leads); B: Severe impact or compression during transport; C: Long-term storage in improper conditions (e.g., humid environments). 2. Never open the case during measurement to prevent electric shock or accidents. 3. During measurement, high voltage is present on the test leads. Do not touch exposed wires or metal parts directly to avoid electric shock. 4. Even if all phase indicators are off, voltage may still be present. Exercise caution to prevent electric shock. 5. Do not measure circuits exceeding 600V to prevent unsafe conditions. 6. When measuring at 200V AC, continuous use should not exceed 60 minutes; at 600V AC, continuous use should not exceed 4 minutes. 7. Do not use outdoors in rainy conditions or in humid environments to avoid safety hazards. 8. Avoid contact with water or corrosive liquids. Do not store in direct sunlight or in high-temperature, high-humidity environments to maintain performance. 9. Do not open the casing unless qualified. Unauthorized disassembly may impair performance. 10. Users must be trained and knowledgeable in high-voltage operation and measurement procedures. Always follow the instructions in the manual when operating the device.