Uses: can be used in electronic factories, electrical appliances, car maintenance, household, etc., widely used It will send out multiple alarms through sound and light. When the voltage is detected, the tip will send out red light and beep. When the higher the sensed voltage is, or the closer it is to the voltage source, it beeps at a higher frequency. At the same time, the screen will be red or green, red means high voltage and live wire are detected, green means low voltage and null wire are detected. Material: plastic Color: as shown Package Contents: 6 x Voltage Tester Pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 3. Humanized clip design for easy electrical maintenance and portability 4. Fully insulated anti-fall material, and improved performance 2. Maintenance electrical measurement / screwdriver assist 5. Self-checking LED high-brightness bulbs: high-brightness works smoothly and is still clearly visible in the sun 1. High hardness and good electrical conductivity