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Professional digital AC voltage tester pen with green backlit LCD display and 12-300V detection range.

Technical diagram of the voltage tester showing buttons, LCD display, and physical dimensions.

Using a digital voltage tester to locate a breakpoint in a blue insulated wire.

Professional digital AC voltage tester pen shown with its retail packaging box and user manual.

Built-in LED flashlight at the tip of the voltage tester illuminating a dark surface.

Measuring 223V AC voltage at a circuit breaker panel using the digital probe.

Portable pocket clip design of Xin Tester voltage detector pen

Portable pocket clip design for easy storage of electrical tester pen

Voltage tester identifying live wire with red screen and neutral wire with green screen.

Features & Details

Equip yourself with the ultimate voltage tester pen designed for safety, accuracy, and convenience. Whether you are a professional electrician or a home DIYer, the XT89 provides reliable readings without the danger of electric shock.

🛡️ Ultimate Safety Protection: Built-in overload protection circuit ensures safe testing. If the current is too high, it automatically disconnects to prevent shocks.
⚡ 5-in-1 Multifunction: Accurately measures AC voltage (12~300V), identifies Live/Null (Fire/Zero) wires, tests wire continuity, and locates hidden breakpoints.
🔔 Smart Dual Alerts: Instantly know the status with the acousto-optic system—the digital screen changes color (Red/Green) accompanied by a high-frequency buzzer.
💡 Built-in LED Flashlight: Never struggle in dark environments or poorly lit circuit breaker panels again. Auto power-off after 5 minutes saves battery life.
📎 Pocket-Friendly Design: The personalized pen holder clip allows you to securely attach it to your shirt or work belt for easy everyday carry.

About this item

Product specification

General Information

Feature	Description
Brand Name	Xin Tester®
Model Number	XT89
Item Type	Voltage Detector / Electric Pen Multimeter
Display Type	Digital LCD Display with Backlight
Accuracy Class	1V
Dimensions	145 × 20 × 22 mm
Power Supply	Battery Powered
Certification	CE, RoHS
Origin	Mainland China

Technical Specifications

Functional Indicators	Range	Basic Accuracy
AC Voltage	12-300V, 50/60Hz	±(5%+3)
Operating Temperature	0-40°C
Storage Temperature	-10-50°C ±(1.0%+5)
Humidity	≤95%
Altitude	≤2000m
Safety Compliance	CAT.II 300V
NCV Function	√
Inductive Mode	√
Wire Connection Test	√
Battery Positive Detection	√
Automatic Shut-down	√
Flashlight	√

The Ultimate 5-in-1 Smart Voltage Tester Pen

Electrical troubleshooting shouldn’t be a guessing game. The XT89 voltage tester pen is an essential safety tool for electricians, maintenance personnel, and DIY homeowners. Built with internal overload protection, it accurately detects AC voltage while keeping you completely safe from electrical shocks.

Zero & Fire Wire Identification

Instantly distinguish between wires. Touch the solid metal NCV probe to the conductor. For a Fire line, the screen turns red with a fast beep (“HI”). For a Zero line, it stays green with a slow beep (“U”).

AC Voltage Measurement (12~300V)

Turn on the voltage tester pen and enter AC test mode. It will automatically detect and display the exact AC voltage on the screen, ranging from 12V to 300V, making circuit panel testing a breeze.

Line Breakpoint Detection

Slide the probe along insulated wires. The frequency of the buzzer increases the closer you get to the voltage source, allowing you to accurately pinpoint hidden breaks in electrical cords.

Wire Conduction Function

Check if a circuit is complete. Put the probe near the wire; if connected normally, the screen shows “-C” and the buzzer rings. If the wire is open, the pencil will not respond.

Designed for Daily Convenience

Bright LED flashlight illuminating the flathead probe

Built-in LED Flashlight

Never work in the dark. This electrical tester comes with a bright LED flashlight to illuminate your work area. Plus, the auto shut-off function powers down the device after 5 minutes of inactivity to save battery life.

Portable voltage detector safely secured in a shirt pocket

Easy to Carry Clip Design

Take it anywhere. The back of the tester features a personalized pen holder clip, allowing you to securely attach it to your shirt pocket or tool belt for quick access during maintenance work.

Why Choose the XT89 AC Circuit Tester?

Safety is paramount when working with electricity. Whether you are installing a new light fixture or diagnosing a faulty outlet, understanding the presence of alternating current is critical. You can learn more about general electrical safety standards on Wikipedia’s Electrical Safety Testing page. The XT89 provides visual and auditory alerts, ensuring you are never caught off guard.

Full package including the digital detector, retail box, and manual

What’s in the Box?

Get everything you need to start testing safely right out of the box.

1 x XT89 Voltage Tester Screwdriver
1 x Comprehensive User Manual
1 x Protective Retail Packaging

Questions about bulk orders? Contact our support team or explore our full range of testing instruments.

FAQs

Q1: How does this tester pen distinguish between a Live (Fire) and a Zero (Null) wire?

A: It uses an intuitive dual-alert system. When detecting a Live wire, the LCD screen turns red and the buzzer sounds rapidly. For a Zero wire, the screen turns green and the buzzer sounds slowly.

Q2: Can the XT89 help me find a break inside an insulated wire?

A: Absolutely! Using its non-contact voltage (NCV) detection, simply slide the pen along the insulated wire. The point where the beeping stops or drops significantly is exactly where the internal breakpoint is located.

Q3: What is the AC voltage measurement range for this device?

A: The XT89 is designed to accurately detect and display AC voltages ranging from 12V to 300V. The exact voltage reading is displayed clearly on the digital screen.

Q: Can I use this tester in dark electrical boxes or at night?

A: Yes, it features a built-in bright LED flashlight near the probe. It serves as an excellent emergency light, ensuring you can see terminal boards and sockets clearly in dark environments.

XT89 Smart 5-in-1 Voltage Tester Pen, AC Circuit Detector (12-300V) with Flashlight

Original price was: $15.99.Current price is: $10.99.

Spend over $99, get $5 off instantly

6–12 Month Warranty

Repair & Refund support available for most products.

Free Worldwide Shipping

Ships within 3 business days.

Taxes & Duties

Buyer responsible for local import fees.

24/7 After-Sales Support

Technical assistance & video guidance within 24h.

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