✨ Self Check Function ✨
In self-check before use, please hold the pen tip with one hand and touch the tail with the other hand.When the light is on, it means the tester pen is normal and has sufficient power. No light indicates that the battery needs to be replaced.
【Safe&High-quality】
Our tester pen is composed of high-quality and durable Drop-proof insulation, ABS, 45 steel, which ensure the safety while using