Multifunction Dual LED AC-DC Light Tester Pen

It is easy to detect the fire/zero line and know which line has a bad situation. Features: With a self-checking function to know whether the pen battery works or not. LED indicates light, long service time, and convenience to view the detection result. The nib is designed with a screwdriver, which is convenient for you to open the socket box at any time. Pen clip design, mini size, and lightweight for easy carrying. A perfect tool kit for home and electric industry uses.

1. Self-Test: Self-test is required before use, hold the batch head in one hand and touch it in the other hand. The green light indicates that the battery is sufficient for use. If the indicator is off then the batteries need to be replaced (Battery model: LR41)

2. Live wire detection: when the batch head contacts the power supply and the red light lights up at the same time, it indicates live wire.

3. Zero line detection: When the batch head contacts the power supply, the green light indicates the zero line.

Note: Design, Packaging and internal PCB may differ in each lot.