--- product_id: 594569208 title: "Auto LED Test Light, 5-30V Digital Display Fuse Tester, Heavy Duty Circuit Tester with Polarity Indicate, and Extended Spring Wire Car Repair Diagnostic Tool, Car Truck Low DC Voltage Light Tester" brand: "nalacal" price: "€ 50.79" currency: EUR in_stock: true reviews_count: 2 category: "Nalacal" url: https://www.desertcart.be/products/594569208-auto-led-test-light-5-30v-digital-display-fuse-tester store_origin: BE region: Belgium --- # LED digital display with polarity indicator 2-30V wide voltage range 1.2m retractable spring wire Auto LED Test Light, 5-30V Digital Display Fuse Tester, Heavy Duty Circuit Tester with Polarity Indicate, and Extended Spring Wire Car Repair Diagnostic Tool, Car Truck Low DC Voltage Light Tester **Brand:** nalacal **Price:** € 50.79 **Availability:** ✅ In Stock ## Summary > ⚡ Diagnose like a pro, drive with confidence! ## Quick Answers - **What is this?** Auto LED Test Light, 5-30V Digital Display Fuse Tester, Heavy Duty Circuit Tester with Polarity Indicate, and Extended Spring Wire Car Repair Diagnostic Tool, Car Truck Low DC Voltage Light Tester by nalacal - **How much does it cost?** € 50.79 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/594569208-auto-led-test-light-5-30v-digital-display-fuse-tester) ## Best For - nalacal enthusiasts ## Why This Product - Trusted nalacal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First:** Integrated needle protective cover prevents accidental pricks and loss, perfect for on-the-go pros. - • **Polarity Made Simple:** Dual-color LED indicators (red for positive, green for negative) eliminate guesswork instantly. - • **Universal Compatibility:** Tests all 2-30V DC automotive circuits—from headlights to fuses—with unmatched versatility. - • **Durable & Portable Design:** High-tensile PU-coated spring wire stretches up to 1.2m and retracts for clutter-free storage. - • **Precision Voltage Monitoring:** Real-time 0.1V resolution digital display ensures you never miss a voltage fluctuation. ## Overview The Auto LED Test Light is a heavy-duty automotive diagnostic tool featuring a wide 2-30V DC test range, a crystal-clear LED digital display with polarity indicators, and a durable 1.2-meter retractable spring wire. Designed for professional-grade circuit testing, it quickly identifies voltage, polarity, and pulse signals in car and truck electrical systems, while its integrated needle guard ensures safe, portable use. Ideal for millennial managers who demand precision and efficiency in vehicle maintenance. ## Description Product description Digital Circuit Test with Voltage Meter and Polarity Protection! Digital Display: Real-time display for accurate voltage readings. Quick Identification: Two-color LED indicator, can quickly show the polarity of the circuit. Retractable Spring Wire: Made of TPU material, with a maximum extension length of 1.2m, featuring tensile strength, durability and anti-freezing. Large Opening Clips: Suitable for vehicle battery and metal iron clip connection, sensitive and accurate to meet the DC, AC, pulse multi-function testing Needle Protective Cover: Rubber probe cover protective sleeve, anti-loss, easy to put in the pocket to carry around. Specifications *1. Material: ABS+alloy *2. Size: 138 * 17mm *3. Spring Wire Length: 1.2 meters max. *4. Linear Material: TPU antifreeze material *5. Voltage: DC 2-30V(+_0.2V Accuracy) Red and Green Dual-color Signal Light The main needle as the object of identification, red lamp for the positive pole; green lamp for the negative pole (the main lamp can be recognized to monitor the 5-30V voltage) LED High-Definition Display Visualization of clear figures, clear reading (dim light display), dark environment can also be normal operation, can quickly identify the line voltage situation (range 2-30V) Top Visualization Light Positive and negative identification of the top test lamp can quickly distinguish between positive and negative, when the "+" show red light is positive, when the "-" show green light is negative. Portable Design One-piece needle protection cover, combined clip, compact, can be easily placed in the work clothes bag, is the best helper for maintenance masters. Are you bothered by the single function of the old circuit? Are you bothered by the messy wires of the old circuit? Are you bothered by the inability to monitor voltage in real time with an old circuit? Circuit is your best choice! ✔2-30V DC Wider Range ✔1.2m Extended Spring Wire ✔LED Indication, Bidirectional Voltage Testing ✔ Clear Digital Display ✔Anti-loss Needle Guard Protection Auto Circuit Widely used in various automotive circuits Check if the circuit is powered on! Check whether various lights fail, electrical circuits and safety components in the car are live, etc. Test line distinguishing positive and negative poles! If the line or positive and negative pins cannot be identified, the traffic lights inside the pen quickly distinguish between positive and negative poles. Check the pulse signals of each component! For example, detecting pulse signals such as ignition signals, fuel injection signals, and sensor signals. Check if the real virtual electric string of the line is damaged during the construction of the railway! If you observe the difference in brightness between the light and dark levels of the written test, bright indicates real voltage and dark indicates ghost voltage. Check the real-time voltage of various circuits and electrical appliances! Real time visualization of voltage changes in circuits. Digital Led Display Test Light Review: ممتازه - كما في الوصف يادي الغرض Review: جهاز يفي بالمطلوب - ممتاز جدا ## Features - 🚗【Multi-function Test Light】Check if the circuit is powered on; Check whether various lights fail; electrical circuits and safety components in the car are live; Test line distinguishing positive and negative poles; Check the pulse signals of each component; Check if the real virtual electric string of the line is damaged during the construction of the railway; Check the real-time voltage of various circuits and electrical appliances. - 🚗【Widely Test Range】This automotive test light has a voltage test range of 2-30V, which is wider than most test lights on the market, and can effectively solve the problem of low voltage circuit monitoring. And it's perfect for checking all kinds of automotive circuit problems, such as automotive headlights, taillights, fuses, automotive batteries, circuit polarity, real-time voltage - 🚗【LED Digital Display and Auxiliary Lighting】Digital voltage circuit tester is equipped with LED digital display, it can display the voltage and positive and negative polarity, and voltage reading resolution of 0.1V, the digital reading is clearly visible, day and night can be used. Red and green signal lights, red light for positive; green light for negative. - 🚗【Extended Spring Wire】The car voltage tester is made of high quality shrinkage spring wire, the outer layer is PU leather with high tensile strength, the inner layer is copper wire with good electrical conductivity, the stretching length can reach 1.2 metres, it automatically recovers after stretching, it is small in size and very convenient to use and store. - 🚗【Integrated Needle Protective Cover】The car light tester is equipped with a sharp stainless steel probe, in order to avoid stabbing the user, a one-piece protective cover is designed to protect the user as well as prevent loss. Convenient combination of clip and probe, when using the pin, turn the clip to remove the probe. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CNYRJKKT | | Best Sellers Rank | #18,871 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #27 in Circuit Testers | | Brand Name | NALACAL | | Customer Reviews | 3.9 out of 5 stars 5 Reviews | | Included Components | NO | | Indoor Outdoor Usage | Indoor | | Is Assembly Required | No | | Item Dimensions | 15 x 10 x 3.5 centimeters | | Manufacturer | NALACAL | | Manufacturer Part Number | DER-8I-78JN | | Material Type | Steel | | Operation Mode | Manual | | Power Source | Battery Powered | | Set Name | Single | | Size | S | | Supported Battery Types | No batteries required | | Theme | Automotive, Repair | | UPC | 755745799916 | | Unit Count | 1 Count | ## Images ![Auto LED Test Light, 5-30V Digital Display Fuse Tester, Heavy Duty Circuit Tester with Polarity Indicate, and Extended Spring Wire Car Repair Diagnostic Tool, Car Truck Low DC Voltage Light Tester - Image 1](https://m.media-amazon.com/images/I/61STml9FCIL.jpg) ![Auto LED Test Light, 5-30V Digital Display Fuse Tester, Heavy Duty Circuit Tester with Polarity Indicate, and Extended Spring Wire Car Repair Diagnostic Tool, Car Truck Low DC Voltage Light Tester - Image 2](https://m.media-amazon.com/images/I/51XY2cEEhjL.jpg) ![Auto LED Test Light, 5-30V Digital Display Fuse Tester, Heavy Duty Circuit Tester with Polarity Indicate, and Extended Spring Wire Car Repair Diagnostic Tool, Car Truck Low DC Voltage Light Tester - Image 3](https://m.media-amazon.com/images/I/61MABWQOFIL.jpg) ![Auto LED Test Light, 5-30V Digital Display Fuse Tester, Heavy Duty Circuit Tester with Polarity Indicate, and Extended Spring Wire Car Repair Diagnostic Tool, Car Truck Low DC Voltage Light Tester - Image 4](https://m.media-amazon.com/images/I/6197TFhyvuL.jpg) ![Auto LED Test Light, 5-30V Digital Display Fuse Tester, Heavy Duty Circuit Tester with Polarity Indicate, and Extended Spring Wire Car Repair Diagnostic Tool, Car Truck Low DC Voltage Light Tester - Image 5](https://m.media-amazon.com/images/I/61fvJ3-59SL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ ممتازه *by A***Q on 15 May 2026* كما في الوصف يادي الغرض ### ⭐⭐⭐⭐⭐ جهاز يفي بالمطلوب *by M***L on 2 August 2025* ممتاز جدا ## Frequently Bought Together - Auto LED Test Light, 5-30V Digital Display Fuse Tester, Heavy Duty Circuit Tester with Polarity Indicate, and Extended Spring Wire Car Repair Diagnostic Tool, Car Truck Low DC Voltage Light Tester - Clorox Liquid Bleach Original 3.78Litre - COMFORT Fabric Softener, Spring Dew, with freshness-burst technology for longer lasting fragrance & soft clothes, 3L --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/594569208-auto-led-test-light-5-30v-digital-display-fuse-tester](https://www.desertcart.be/products/594569208-auto-led-test-light-5-30v-digital-display-fuse-tester) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-07-15*