How to replace batteries?

At the end of the name 'Southwire' is a small recess. Push in with pin or pencil point and pull the back of the tester out exposing the circuitry. Roll the tester over opposite the pocket clip and the two AAA batteries are exposed.

Does this model make a different tone on nuetral and hot? Its hard to tell which review goes to which model.

The 40116N only produces one tone when it detects AC Voltage.

Is this product made in the USA?

No…. It says in description - product origin China

The tester I received is defective. I am either needing replaced or a refund. I have purchased this product before and am generally satisfied.

Souethwire and will be free of defects in material and workmanship (“Defects”) for 12 months following ship date, under normal use and regular service and maintenance

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Description

⚡ Stay live, stay safe — the voltage tester that works as hard as you do!

READY WHEN YOU ARE - Green LED confirms tester readiness, eliminating guesswork on the job.
SMART BATTERY SAVER - Auto power-off after 5 minutes maximizes battery life so you stay powered longer.
ILLUMINATE DARK SPACES - Integrated flashlight lets you work confidently in dim or cramped areas.
INSTANT VOLTAGE DETECTION - Audible & visual alerts for 100-600V AC ensure you never miss a live wire.
CERTIFIED SAFETY ASSURANCE - CAT IV 600V rating with UL & CUL listings means professional-grade protection.

The Southwire 40116N NCV Detector is a pen-style, non-contact AC voltage tester designed for professionals needing quick, reliable detection of 100-600V AC. Featuring audible and visual alerts, a built-in flashlight, and an auto power-off function to extend battery life, it meets CAT IV 600V safety standards and comes UL and CUL listed for trusted performance on outlets, breakers, and wiring.

Specifications

Brand	Southwire
Power Source	Battery Powered
Style	100-600V AC
Color	Brown
Item Weight	0.16 Pounds
Item dimensions L x W x H	0.83 x 0.99 x 6.23 inches
Min. Operating Voltage	1E+2 Volts (AC)
Specification Met	Cul Listed
Measurement Type	Voltmeter
UPC	032886963025 032886963032
Manufacturer	Southwire
Global Trade Identification Number	00032886963025
Part Number	59992040
Item Weight	2.56 ounces
Product Dimensions	0.83 x 0.99 x 6.23 inches
Item model number	40116N
Batteries	2 AAA batteries required. (included)
Is Discontinued By Manufacturer	No
Size	Standard
Finish	Brushed
Material	Blend
Pattern	Solid
Shape	Rectangular
Item Package Quantity	1
Measurement System	US
Display Style	LED
Included Components	40116N, AAA Battery (2)
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
Warranty Description	2 Years

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