The is far more than just another screwdriver — it’s a simple digital tester and detection tool all in one, built to help you quickly check live circuits and voltage without dragging out a full multimeter. In practice, it’s designed to give you a rough voltage read from about 12 V up to 220 V AC/DC right on a tiny LCD screen so you know what you’re dealing with before you poke around live wires.

And that matters a lot on a job site because with quick live voltage detection you can save time and avoid guesswork when you’re troubleshooting outlets, switches or cables. It’s not a replacement for precision gear, but with its 2‑in‑1 tester/screwdriver design you’re carrying less bulk while still having a real, usable tool at your fingertips.

Key Features:

• Digital Voltage Display – Shows a live voltage range directly on an LCD so you can see what you’re testing without guessing.
• 12–220 V AC/DC Detection – Works across common household and light industrial voltages so you’re covered on most jobs.
• Breakpoint & Induction Testing – Lets you find phase/ground breaks or current flow in insulated wires from the outside.
• 2‑in‑1 Screwdriver – Gives you basic mechanical function along with electrical testing in one compact tool.
• Battery‑Powered Simplicity – Runs without fancy setup so you can grab it and go without digging for chargers or leads.

Applications

Out in the field or at home, this voltage tester screwdriver gets used for checking live wires, outlets, switches and basic circuits before you start working so you don’t accidentally touch a live line. Electricians use it to quickly spot whether a socket is hot, and DIYers find it handy for sorting out why a light or fan won’t come on. The breakpoint test helps tease out where a line has gone open without stripping insulation — a nice plus when you’re in a hurry.

Why Choose This Model

You go with this model because it’s plain and practical: no bells, no whistles, just a straightforward digital detection screwdriver that tells you what you need to know — live or no live — without fuss. On a crowded tool belt, it’s the kind of lightweight, inexpensive piece that actually gets used instead of collecting dust. And in real work, knowing a line is hot before you touch it isn’t “nice to have” — it’s essential for safety and sanity.

Technical Specifications Explained

• Voltage Range – Detects from roughly 12 V up to 220 V so you can test most household and light commercial circuits.
• Display Type – LCD readout gives you a quick visual on voltage levels instead of just a neon blink.
• Power Source – Battery operation means you don’t depend on external power or leads.
• Model Number – 66‑137 lets you be sure you’re looking at this specific tool when ordering or replacing.
• Item Weight – Around 10 g keeps it feather‑light on your belt.

Who Should Buy This

If you’re an electrician who’s sick of fumbling around with bulky meters for every quick check, or a homeowner who wants a better way to see if an outlet is actually live before you touch anything, this digital detection screwdriver is a solid add‑on. It won’t replace your high‑end testers, but it’s perfect for fast checks, troubleshooting and everyday electrical work when you want to keep gear light and simple.

And because it’s cheap, light and easy to use, it’s also a no‑brainer for apprentices, DIYers, and anyone who has to poke around circuits on a regular basis without lugging a toolbox everywhere.