Electric test pen/digital display electric pen 3-36V/repair and maintenance electric test pen tool product features: 1. Sharp steel probes can easily pierce wire insulation to check circuits. 2. The probe pen is ideal for checking circuits, fuses, switches and wiring in cars, trailers, boats, motorcycles and other low voltage systems. 3. Ground the alligator clip and test the circuit with a probe. When the light is on, there is electricity. product instructions: 1. Clip the measured alligator clip to the ground wire (such as the metal or negative pole of the car) 2. Measure the conductive metal in the test circuit with the needle of the electric pen 3. If the light bulb of the stylus will light up, it means that the measured point has formed a circuit and works normally. On the contrary, there is a fault at the measured point, which is to be checked. Product Specifications: Material: ABS+metal Clamping capacity: 20A Bulb: 3 watt bulb (replaceable) Voltage test range: 6v-24v; Pen Length: 17.3 cm/6.8 inche Probe Length: 8.3 cm/3.3 inche Cord length: 96 cm / 37.8 inche Packing weight: 140g Green pen material: ABS+steel, LED Green Pen Size: (Approx.) Pen Length: 150mm, Line Length: 75cm caution: 1. Due to the chip update, the working range is 6V to 24V, but the mark on the test pen body shows 6 to 12V, please do not order if you mind; 2. We default you have accepted when ordering. Thank you for your understanding,; 3. Since the world voltage is different, please allow a tolerance of 1.5V. Product List: 1*Test pen