1. Neutral line identification: the green light is always on 2. FireWire identification: the traffic lights are highlighted at the same time 3. Sensitive touch pole: when the tip of the pen touches the line, measure 4. Put your hand on the touch pole 5. Stretch spring: good elasticity, precise carton up and down the metal 6. Button battery: put in 3 pieces of LR41 button battery 7. Resistor chip: intelligent circuit board, sensitive and stable 8. Slotted batch head: alloy steel material, strong and durable 9. Smart chip motherboard, high safety performance, longer life 10. Eye-catching bright LED lamp beads, durable 11. Dimensions: 140x20mm
