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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Eightwood Pen Electric Tester voltage tester Screwdriver Electric tester pen Electrical Screwdriver 220V Voltage Electrical Pen 220V Electric with Test Power Detector Probe

Product ID: 48027629

Details

Brand
Eightwood
Colour
Yellow green
Item weight
40 Grams
Power source
Electric
Style
Compact

⚡220V voltage detection

📏Compact 75mm length

🛠️Chrome-Vanadium steel tip

$17.91

Duties & taxes included

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power up your toolkit with precision and style!

ERGONOMIC GRIP - ABS+TPR handle ensures comfortable, slip-resistant handling all day
CERTIFIED SAFETY - Meets CE and RoHS standards for trusted, professional-grade testing
COMPACT PORTABLE - Slim 75mm design fits perfectly in your toolkit or pocket 📏
DURABLE BUILD QUALITY - Crafted from robust Chrome-Vanadium steel for long-lasting use 🛠️
PRECISION VOLTAGE DETECTION - Instantly test 220V AC power with reliable accuracy ⚡

The Eightwood Pen Electric Tester is a compact, 220V voltage detection screwdriver crafted from durable Chrome-Vanadium steel with an ergonomic ABS+TPR handle. Designed for professionals and DIY enthusiasts, it offers reliable electrical testing in a sleek 75mm form factor, certified to CE and RoHS safety standards.

Specifications

ASIN	B01MT3RCP1
Best Sellers Rank	13,615 in DIY & Tools ( See Top 100 in DIY & Tools ) 14 in Voltage Testers
Brand	Eightwood
Colour	Yellow,green
Compatible Devices	220V AC power infrastructure
Country Of Origin	China
Customer Reviews	4.3 4.3 out of 5 stars (1,583)
Included Components	no
Item Dimensions	16 x 3 x 3 centimetres
Item Weight	40 Grams
Manufacturer	Eightwood
Manufacturer Part Number	EWTEST003UK
Maximum Operating Voltage	220 Volts
Minimum Operating Voltage	220 Volts
Model Number	EWTEST003UK
Number of Items	10
Power Source	Electric
Specification Met	CE, RoHS
Style Name	Compact
UPC	709202693477

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TrustScore 4.5 | 7,300+ reviews

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