How We Can Measure Accurate Volatge

I don't think you can measure precisely. I think only the bulk range is possible.

Is this item so voltage on display

It does not show actual voltage, but it has pre programmed voltages. If your tested voltage is higher than the programmed voltage, it shows that value. E.g. it has 12v, 24v, 110v & 220v. So if your voltage is say 110v, the tester will display all the voltages : 12,24&110v. If it's 230v , it will show all the lower voltages including 220v not 230v.

- Is this item easy to use?

Yes. This product is simple to use and has no battery. Uses induction for analysis.

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Description

⚡ Stay ahead of electrical issues with precision and speed!

INSTANT LED READOUT - Bright LED display provides immediate, easy-to-read voltage levels, eliminating guesswork on site.
CERTIFIED RELIABILITY - CE certified by the European Commission, ensuring trusted performance and compliance.
PRECISION VOLTAGE DETECTION - Accurately tests live AC/DC voltage from 12V up to 220V for versatile electrical diagnostics.
INDUCTION TESTING CAPABILITY - Detects voltage in live wires without direct contact, enhancing safety and convenience.
BREAKPOINT PHASE LINE IDENTIFICATION - Quickly find phase, ground lines, or breakpoints to streamline troubleshooting.

The STANLEY 66-137 Digital Detection Screwdriver is a lightweight, battery-powered voltage tester designed for professionals needing quick, accurate AC/DC voltage readings from 12V to 220V. Featuring a clear LED display and rapid induction testing, it safely identifies live wires, phase lines, and breakpoints. CE certified for quality assurance, this compact tool is essential for efficient electrical diagnostics.

Specifications

Brand	STANLEY
Power Source	Battery Powered
Style	Digital Tester-Black
Colour	Yellow and Black
Item Weight	10 Grams
Item dimensions L x W x H	10 x 18 x 130 Millimeters
Min. Operating Voltage	12 Volts
Specification Met	CE
Measurement Type	Voltage Tester
Maximum Operating Voltage	220 Volts
Manufacturer	For any warranty related issues or product feedback, please feel free to contact us through our customer care number on: [ 1860-425-1111 ] between 10AM to 5PM from Monday to Friday (except government holidays), Stanley
Manufacturer	Stanley
Country of Origin	China
Item model number	66-137
Product Dimensions	1 x 1.8 x 13 cm; 10 g
ASIN	B00DURVJW8

Reviews

A**N

Okay

Quite okay; but neon light present means good!

22.10.2024

A**T

Good quality

Good quality only neon lamp is missing

25.08.2025

I**M

Decent Functionality. Decent product

Does what it is supposed to do.Battery lated for a very long time.Pretty useless as a screwdriver

30.03.2025

S**S

Good

1.09.2025

M**G

Poor Quality, Poor Performance . Both Buttons jammed with no tactile feedback . Screwdriver too thin 2 b effective

Poor Quality, Poor Performance- it does a good job at testing a break point but the voltage values that show are absurddisplays 110v where it should show 12v ??shows voltages range even in the indirect inductance test , whereas its only supposed to show a symbolThe "current symbol " can pop up with or without contact to the button .Both the buttons don't press, just jammed not sure if its supposed to be that way , I guess notOverall the voltage calculator is as abrud as it can get and you can never ever rely on itShould be used to check only the continuity or breaksThe screwdriver looks too weak to be effective . The reviewers that are pointing out that the LCD isnt clear at all especiallyin low light conditions are 100% correct . The power symbol is also very small to sight . So also the build quality is not upto the mark .My verdict : who created this tool , its such a Joke . A STRICT DONT BUYI have created a youtube video for your help , pls check the video with following title on youtube== Stanley 66-137 Digital Voltage and Beak-Point Tester, Yellow and Black (no battery required) ==

9.10.2017

N**D

It's a useful tool but don't mistake it for a multimeter

This is not a pocket multimeter in case you are looking for it. This is a tester which shows approx. voltage in the line.This is also useful to detect presence of electricity(inductance) in the device without making physical contact. I have used it to test break points in wire sometimes. Useful tool to have. The display is little difficult to read when working in sunlight. It's alright...can't expect more at this price.

24.12.2021

M**M

Very nice

Good condition

30.07.2025

P**R

Not Useful

The value is varying. Not Useful

7.01.2025

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