It has a neon in it. A neon works on a tiny amount of current. The screwdriver has a metal top at the back, and the neon sits between that and the tip of the screwdriver. If you press the tip against mains electricity and press your thumb against the metal top, a tiny current passes through the neon and you. It's not enough for you to notice, but it is enough to light the neon.

how does it allow you to distinguish between the live and neutral wire? does it glow a different colour?

It doesn't. It merely glows if you touch the blade onto a live 220v wire with your thumb or finger on the ferrule at the top of the handle. This is usually used to ensure that the power is disconnected from what you are working on.

What type of batteries does this take, as mine didn't come with any

It doesn’t need batteries. When you touch the blade on the conductor you’re testing, with a finger on the handle cap, you create a path for current to flow from the conductor, through a neon lamp, and into your finger, causing the lamp to illuminate if a voltage is present. Needless to say, the current is very small and harmless.

Why is neon light not showing after inserting into live socket?

Hello, please confirm whether the gesture of using the screwdriver is correct. If the neon light still does not light up correctly, please contact us to send a new electric screwdriver. ...

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Description

⚡ Power up your toolkit with precision and style!

CLEAR POWER INDICATOR - Bright, easy-to-read voltage indication eliminates guesswork and boosts efficiency.
LIGHTWEIGHT PORTABLE - Only 40 grams—carry it anywhere and never miss a beat on the job.
ERGONOMIC COMPACT DESIGN - Fits perfectly in your hand for effortless handling during any electrical task.
INSTANT 220 V VOLTAGE DETECTION - Stay safe and confident with precise mains voltage testing at your fingertips.
DURABLE CHROME VANADIUM STEEL TIP - Engineered for longevity and reliable contact in every test.

The Eightwood Pen Electric Tester is a compact, lightweight 220V voltage tester screwdriver crafted with durable chrome-vanadium steel and ergonomic ABS+TPR materials. Designed for professionals and DIY enthusiasts alike, it offers clear voltage detection and a comfortable grip, making electrical testing safer and more efficient.

Specifications

ASIN	B01MT3RCP1
Best Sellers Rank	7,952 in DIY & Tools ( See Top 100 in DIY & Tools ) 9 in Voltage Testers
Brand	Eightwood
Colour	Yellow,green
Country Of Origin	China
Customer Reviews	4.3 out of 5 stars 1,549 Reviews
Included Components	Handle
Item Dimensions	16 x 3 x 3 centimetres
Item Weight	40 Grams
Item dimensions L x W x H	16 x 3 x 3 centimetres
Item weight	40 Grams
Manufacturer	RFSolution
Maximum Operating Voltage	220 Volts
Minimum Operating Voltage	220 Volts
Model Number	EWTEST003UK
Power Source	Electric
Power source	Electric
Specification Met	CE, RoHS
Style	Compact
Style Name	Compact
UPC	709202693477
Unit Count	1.0 count

Reviews

K**M

Eight wood electrians screwdriver

Good electrians screwdriver , had too replace my old one due to the bulb going so brought this one which gives a clear indication, fits well in the hand with a good blade .

22.03.2026

K**T

Perfect for the job

2.04.2026

P**O

Like it

Happy

7.04.2026

A**S

Great quality

Great quality compared with the others, bit more expensive but a good grip doing the job

14.03.2026

S**N

A Quality Tool.

A decent screwdriver and has a good build quality. Neon light is a little dim but overall, happy with this tool.

15.01.2026

H**I

Good

Seems good. Returned as not needed

12.01.2026

D**H

Did not work

Item did not work contacted supplier no reply contacted supplier again to have an email saying to contact another department sent email still waiting very poor service do not buy if it don't work you will not get any response from supplier.

17.03.2026

A**Q

Very good

Good

22.11.2025

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$46

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In stock

Sold byAmazon BermudaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Bermuda.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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