--- product_id: 716993331 title: "- Heavy Duty Automotive Test Light Circuit Tester, 3-48V Digital Voltage Tester with Voltmeter & Dual Polarity Indicator, Electrical Test Pen with Stainless Probe for Car, Truck, RV, Boat Fuse Testing" brand: "feaoxyo" price: "¥2609" currency: JPY in_stock: true reviews_count: 8 category: "Feaoxyo" url: https://www.desertcart.jp/products/716993331-heavy-duty-automotive-test-light-circuit-tester-3-48v-digital store_origin: JP region: Japan --- # 3-48V voltage range 96-inch flexible coil wire Dual polarity indicator - Heavy Duty Automotive Test Light Circuit Tester, 3-48V Digital Voltage Tester with Voltmeter & Dual Polarity Indicator, Electrical Test Pen with Stainless Probe for Car, Truck, RV, Boat Fuse Testing **Brand:** feaoxyo **Price:** ¥2609 **Availability:** ✅ In Stock ## Summary > 🔧 Power up your precision—test smarter, not harder! ## Quick Answers - **What is this?** - Heavy Duty Automotive Test Light Circuit Tester, 3-48V Digital Voltage Tester with Voltmeter & Dual Polarity Indicator, Electrical Test Pen with Stainless Probe for Car, Truck, RV, Boat Fuse Testing by feaoxyo - **How much does it cost?** ¥2609 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/716993331-heavy-duty-automotive-test-light-circuit-tester-3-48v-digital) ## Best For - feaoxyo enthusiasts ## Why This Product - Trusted feaoxyo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Reach Every Circuit:** Extra-long 96-inch flexible spring coil wire lets you effortlessly access tight, hard-to-reach spots in cars, trucks, RVs, and boats. - • **Rugged Workshop Ready:** Durable ABS body and stainless steel probe resist drops, grease, and impact—built to survive your busiest garage days. - • **Instant Polarity Safety:** Dual-color LED lights instantly show positive (red) or negative (green) polarity, protecting your vehicle’s sensitive electronics from costly errors. - • **Pinpoint Voltage Accuracy:** Crystal-clear LED display delivers precise 0.1V resolution readings from 3 to 48 volts—never guess your battery health again. - • **All-in-One Automotive Essential:** Versatile tester perfect for 12V/24V systems, fuse checks, circuit tracing, and voltage verification—your go-to tool for professional-grade troubleshooting. ## Overview The Heavy Duty Automotive Test Light Circuit Tester by FEAOXYO is a professional-grade digital voltmeter designed for 3-48V automotive systems. Featuring a crystal-clear LED display with 0.1V resolution, dual-color polarity indicators, and a rugged ABS body with a stainless steel probe, it ensures accurate, safe, and durable electrical diagnostics. Its 96-inch flexible coil wire provides unmatched reach for testing cars, trucks, RVs, and boats, making it an indispensable tool for both professional technicians and DIY enthusiasts. ## Description Buy Heavy Duty Automotive Test Light Circuit Tester, 3-48V Digital Voltage Tester with Voltmeter & Dual Polarity Indicator, Electrical Test Pen with Stainless Probe for Car, Truck, RV, Boat Fuse Testing: Circuit Testers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: First tester faulty Replacement is accurate (Read Edit)! - I really wanted to like this tool. It looks very nice and well made except the reading for voltage is off! I like the reading for polarity, (I’d rather the green light be on for correct polarity) and the cord with probe cap is works well. The biggest problem is the voltage reading is not accurate. On a 12 volt car battery I get a reading of over 16 volts. So basically this for me is only a test light for continuity that will also let me know if polarity is correct. Review Edit. Seller offered me a refund right away. But since I don’t check my emails very often I didn’t see offer for around 2 months. I contacted seller to see if offer was still good. The seller refunded my money so I purchased another circuit testers. This second tester works excellent, I checked a battery that I had just charged it showed 13.1 volts. I checked the battery in my car it showed 12.3 volts. This tester appears to be accurate as the voltage numbers are within what I expected. I tested batteries with a meter and the voltages are within 0.2 between meter and test light. I would buy again from this seller as I’m very pleased with their after sale service. Review: Easy to use - Works great easy to use and worth the little extra. ## Features - INSTANT AND ACCURATE VOLTAGE READINGS: This professional digital test light with voltmeter features a crystal-clear digital LED screen that delivers pinpoint voltage measurements from 3-48V with 0.1V resolution. Making it the perfect voltage tester for any automotive electrical work and systems, ideal for professional technicians and DIYers alike - AVOID COSTLY CONNECTION ERRORS: Stay safe and protect sensitive vehicle electronics with the intuitive dual-color polarity lights, red for positive (+) and green for negative (-)—that illuminate instantly when the stainless steel probe touches a circuit. Taking the risk out of electrical work, making it a must-have for garage safety - BUILT TO SURVIVE THE BUSY WORKSHOPS: This electrical tester boasts a rugged ABS body that resists drops, grease and impact, ideal for the chaos of garages or DIY home projects. The sharp stainless steel probe penetrates tight spaces and maintains solid contact, while the reinforced construction ensures long-lasting performance even with daily use - FLEXIBLE TO REACH EVERY SPOT: Effortlessly diagnose hard-to-reach areas with the extra-long, 96-inch flexible spring coil wire. It allows you to easily access any part of your car, truck, or motorcycle from a single ground point. Plus, the integrated anti-lost probe cover keeps your tool protected and easy to find - VERSATILE FOR ALL YOUR NEEDS: This all-in-one automotive circuit tester is ideal for 12V/24V systems. Perfect for checking fuses, verifying voltage at connectors, testing circuits, and tracing wires on your car, truck, RV, boat, and more. Making it an essential tool for consistent quality in your daily electrical troubleshooting ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0DYHCRD5P | | Best Sellers Rank | #6,447 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Circuit Testers | | Brand | FEAOXYO | | Brand Name | FEAOXYO | | Color | black | | Customer Reviews | 4.7 out of 5 stars 438 Reviews | | Included Components | 3-48V Automotive Test Light | | Item Weight | 0.12 Kilograms | | Manufacturer | FEAOXYO | | Maximum Operating Voltage | 48 Volts | | Measurement Type | Voltmeter | | Min. Operating Voltage | 3 Volts | | Minimum Operating Voltage | 3 Volts | | Power Source | Corded Electric | | Specification Met | UL | | UPC | 649226718131 | ## Product Details - **Brand:** FEAOXYO - **Color:** black - **Item Weight:** 0.12 Kilograms - **Min. Operating Voltage:** 3 Volts - **Power Source:** Corded Electric ## Images ![- Heavy Duty Automotive Test Light Circuit Tester, 3-48V Digital Voltage Tester with Voltmeter & Dual Polarity Indicator, Electrical Test Pen with Stainless Probe for Car, Truck, RV, Boat Fuse Testing - Image 1](https://m.media-amazon.com/images/I/71oSc0r2Z5L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ First tester faulty Replacement is accurate (Read Edit)! *by S***R on October 27, 2025* I really wanted to like this tool. It looks very nice and well made except the reading for voltage is off! I like the reading for polarity, (I’d rather the green light be on for correct polarity) and the cord with probe cap is works well. The biggest problem is the voltage reading is not accurate. On a 12 volt car battery I get a reading of over 16 volts. So basically this for me is only a test light for continuity that will also let me know if polarity is correct. Review Edit. Seller offered me a refund right away. But since I don’t check my emails very often I didn’t see offer for around 2 months. I contacted seller to see if offer was still good. The seller refunded my money so I purchased another circuit testers. This second tester works excellent, I checked a battery that I had just charged it showed 13.1 volts. I checked the battery in my car it showed 12.3 volts. This tester appears to be accurate as the voltage numbers are within what I expected. I tested batteries with a meter and the voltages are within 0.2 between meter and test light. I would buy again from this seller as I’m very pleased with their after sale service. ### ⭐⭐⭐⭐⭐ Easy to use *by I***0 on February 27, 2026* Works great easy to use and worth the little extra. ### ⭐⭐⭐⭐⭐ Good toolbox addition *by B***E on March 21, 2026* Far better than a simple light, and easier to use than a multimeter. It found a corroded fuse that was acting like a resistor. (voltage drop across fuse). easy to read, easy to use. --- ## 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.jp/products/716993331-heavy-duty-automotive-test-light-circuit-tester-3-48v-digital](https://www.desertcart.jp/products/716993331-heavy-duty-automotive-test-light-circuit-tester-3-48v-digital) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-07*