Ever stared at an outlet, a mysterious wire behind a wall plate, or that “is this thing actually off?” moment and wished you had a magic wand that could just tell you without risking a zap? Meet the Proster Non-Contact Voltage Tester Pen—the little orange-and-black gadget that basically gives you electric Spidey senses.
This pen-shaped detector lets you check for AC voltage (default 48–1000V, or drop it to 12–1000V with a sensitivity tweak) without touching a single live wire. Wave the tip near outlets, switches, cables, or circuit breakers and it lights up and beeps when it senses voltage. It even helps distinguish live from neutral wires up close and can help track down breakpoints. Three sensitivity levels (high/medium/low) mean you can dial it in for different situations instead of getting false alarms from every nearby appliance.
The fun extras that make it more than just a beeper
- Built-in white LED torch for those dark corners, crawlspaces, or “why is the breaker panel always in the gloomiest spot?” moments.
- Audible + visual alarms that get more insistent the closer (or stronger) the voltage is—no subtle hints here.
- Auto power-off to save the two included AAA batteries, plus a low-battery indicator so it doesn’t ghost you mid-job.
- Pocket clip and tough ABS/PVC build, so it survives being tossed in a toolbox or clipped to a shirt pocket.
- Safety ratings of CAT III 1000V / CAT IV 600V for peace of mind on typical home and light commercial work.


