Connected Detector -Multi-Function Digital Display Pencil Screwdriver Electroscope Digital Display Pen Highlights brand generic Multi-Function Digital Display Pencil Screwdriver Electroscope Digital Display Pen Description: Made of chrome-vanadium steel, any high frequency quenching. With an LCD screen, the voltage value can be clearly observed. The LED lights up when testing the shot wire. Curved design, touch buttons, ABS plastic case, strong and durable. No battery needed. Used for AC current, leakage, ground, line continuity detection. specification: Material: steel Size A: length 128mm/5.04inch; width 16mm/0.63inch Size Two: length 145mm/5.71inch; width 26mm / 1.02inch Package includes: 1 piece test pencil