Product description Test pencil Function: Measure whether the line has electricity through the tip of the electric pen, and judge whether there is electricity through the diode of the electric pen. Application: Electrician Features: The dual-purpose electric test pen can be used as a screwdriver (cro and flat-blade screwdriver). The handle is made of high-quality plastic and environmentally friendly materials, with a particle non-slip design, which is very durable and safe to use. The shaft with an insulating cover ensures safety and prevents short circuits. There are high-quality diodes in the handle, and the diodes will glow when current paes. Specification Color: red/yellow Material: metal and plastic Length: 16cm (6.3in) Measuring range: 100-220V Quantity: 1Pc Note: 1. Due to manual measurement, please allow an error of 0-1cm. Please make sure you don't mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the item. Thanks! The package includes: 1 x Dual-purpose electric test pen (without retail packaging) Introduce Electric pen, referred to as "electric pen". It is an electrician's tool used to test whether there is electricity in the wire. There is a neon bulb in the pen body. If the neon bulb glows during the test, it indicates that the wire has electricity or is a live wire. The tip and tail of the test pencil are made of metal materials, and the barrel is made of insulating materials. When using the test pen, be sure to touch the metal part of the end of the test pen with your hand, otherwise, because the charged body, the test pen, the human body and the earth do not form a loop, the neon bubble in the test pen will not emit light, causing a misjudgment, and it is considered a charged body Uncharged.