Does this require our own 2 aaa batteries? it is difficult to open, how to open?

I had to provide the batteries. The device is hard to open to insert the batteries. The red section slides forward on the black section after you press the red button on the clip. I used a thin blade to pry the red section forward after depressing the button on the clip. The good news is that the device works great!

Can you test christmas LED string lights with this?

Hello good afternoon, you can run the tester along the wirring insulation to see if their is a break in the wirring but to test the little socket it may be troubling.

where is it manufactured?

Hello good afternoon sir, The circuit board is probably made in china, but for a cheap product it works for me in basic troubleshooting in electrical circuit installations.

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Mr. Pen- Voltage Tester, Electrical Tester, Non Contact Voltage Tester | Tester Electric, Electric Tester Pen, Voltage Detector, Electrical Testers, Voltage Tester Pen, Electricity Tester

Product ID: 349076239

Details

Brand
Mr. Pen
Color
Red & Black
Item Weight
9.07 g
Power Source
Electricity
Style
Voltage Tester

⚡Non-contact AC voltage detection

📏Compact & lightweight (9.07g)

🛡️Insulated safe operation

5944 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Stay Shock-Safe & In-The-Know with Mr. Pen Voltage Tester!

POCKET SIZED POWER - Ultra-lightweight and compact design with a clip for effortless portability and quick access.
VERSATILE USE CASES - Perfect for home repairs, circuit inspections, and professional electrical diagnostics.
TRUSTED BY THOUSANDS - Highly rated with 4.5 stars from over 1,700 users—join the savvy pros who rely on Mr. Pen.
CERTIFIED SAFETY STANDARDS - Meets CE and RoHS certifications ensuring reliable and compliant electrical testing.
TOUCH FREE VOLTAGE DETECTION - Instantly sense live wires without any physical contact for ultimate safety.

Mr. Pen Voltage Tester is a lightweight, non-contact AC voltage detector designed for safe and efficient electrical testing. Certified to CE and RoHS standards, it offers quick, reliable detection of live wires without direct contact. Ideal for home users and professionals alike, its compact design with a pocket clip ensures it’s always ready for on-the-go diagnostics.

Specifications

ASIN	B092LFYTG5
Best Sellers Rank	#60,438 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #96 in Multi Testers
Brand Name	Mr. Pen
Color	Red & Black
Customer Reviews	4.5 4.5 out of 5 stars (1,770)
Item Weight	9.07 g
Manufacturer	Mr. Pen
Measurement Type	Voltmeter
Model	NCD01
Part Number	NCD01
Power Source	Electricity,electric
Specification Met	CE, RoHS
Style Name	Voltage Tester
UPC	810053332634

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