About this item Accurate Measurement- AC voltage measurement range is 121000V, 50 or 60Hz, high accuracy, detection distance<5mm, easy to operate, compact and lightweight, suitable for professional electricians. Sensitivity Adjustment- Supports automatic selection of 3 types of sensitivity (high, medium, and low). With LED light function, it is suitable for working in dim environments. Multiple Functions- Intelligent identification of live and neutral lines, automatic detection, with sound and light alarm function and signal indicator distinction, high security. Automatic Shutdown Function- Automatic shutdown when there is no operation for 3 minutes and no voltage signal is detected, saving energy and electricity. NCV Induction Head- Voltage tester adopts NCV induction head, which supports non contact measurement, safe and reliable, and makes the measurement more accurate. How to Use: 1. When the battery voltage drops to less than 2.5V, the display will show a low battery sign. When the battery voltage drops to less than 2.3V, the voltage detector will automatically shut down. 2. Live wire test: Place the sensing end of tester close to the object to be tested, the red light is always on, it means it is a live wire 3. Neutral line test: Put the sensing end of tester close to the object to be tested, the green light is always on, it means it is the neutral line Feature: 1. NCV Induction Head: Voltage tester adopts NCV induction head, which supports non contact measurement, safe and reliable, and makes the measurement more accurate. 2. Sensitivity Adjustment: Supports automatic selection of 3 types of sensitivity (high, medium, and low). With LED light function, it is suitable for working in dim environments. 3. Multiple Functions: Intelligent identification of live and neutral lines, automatic detection, with sound and light alarm function and signal indicator distinction, high security. 4. Automatic Shutdown Function: Automatic shutdown when there is no operation for 3 minutes and no voltage signal is detected, saving energy and electricity. Specification: Item Type: Voltage Tester Material: Plastic Product Model: RuoShui 11 Measuring Voltage Range: AC Voltage: 12-1000V, 50 or 60Hz Working Temperature: 0-40 Storage Temperature: -10-50 Humidity: 95 percent Height: 2000m Security Compliance: CAT. III 1000V CAT. IV 600V CE Detection Distance: <5mm Sound and Light Alarm: Alarm Mode Battery: 2 x 1.5 AAA Battery (Battery Not Included) Package List: 1 x Tester Pen (Battery Not Included) Note: Please read the instructions carefully before use, and strictly abide by the safety rules and cautions, cautions and warnings listed in the instructions. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.