{"product_id":"dc-led-digital-voltmeter-5-30v-mini-voltage-tester","title":"DC 5–30V LED Digital Voltmeter – 0.28\" Mini Voltage Tester","description":"\n\u003ch2\u003eDC LED Digital Voltmeter – Compact, Accurate \u0026amp; Easy to Install\u003c\/h2\u003e\n\u003cp\u003eKeep a close eye on your electrical systems with this ultra-compact \u003cstrong\u003eDC LED Digital Voltmeter\u003c\/strong\u003e. Whether you're monitoring a car battery, motorcycle, solar panel, mobile power bank, or DIY electronics project, this mini voltmeter delivers fast, reliable voltage readings on a bright 0.28-inch three-digit LED display. Its small footprint and panel-mount design make it ideal for dashboards, control boxes, and custom builds.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Range:\u003c\/strong\u003e Detects DC voltages from 0 to 40V, with a 2-wire operating range of 4V–40V — suitable for 5V, 12V, 24V, and other common DC systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBright 0.28\" LED Display:\u003c\/strong\u003e Three-digit Nixie tube display ensures clear readings even in low-light conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Refresh Rate:\u003c\/strong\u003e Updates approximately every 200ms for near real-time voltage monitoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReverse Polarity Protection:\u003c\/strong\u003e Built-in protection helps prevent damage if wires are accidentally connected in reverse.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Draw:\u003c\/strong\u003e Operating current under 20mA keeps power consumption minimal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimple 2-Wire Installation:\u003c\/strong\u003e No extra power supply required — the meter is powered directly from the circuit it measures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePanel-Mount Ready:\u003c\/strong\u003e Compact 30 × 11.7 × 9.2mm body fits neatly into a 23 × 10mm installation opening.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Operating Range:\u003c\/strong\u003e Works reliably across temperatures from -10°C to +65°C.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.28-inch 3-digit LED Nixie tube\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e2-Wire Working Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4V – 40V (with reverse protection)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e2-Wire Detection Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0V – 40V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 20mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±3%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRefresh Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~200ms\/reading\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBody Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 × 11.7 × 9.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePanel Cutout Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e23 × 10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-10°C to +65°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlastic\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × DC LED Digital Voltmeter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomotive \u0026amp; motorcycle battery monitoring\u003c\/li\u003e\n  \u003cli\u003eSolar panel \u0026amp; battery bank systems\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and RC projects\u003c\/li\u003e\n  \u003cli\u003ePower supply testing and verification\u003c\/li\u003e\n  \u003cli\u003eCustom control panels and enclosures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-50-psi-dial-tire-pressure-gauge-car-motorcycle-bike\"\u003e0–50 PSI Dial Tire Pressure Gauge – Car, Motorcycle \u0026amp; Bike\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-4-inch-npt-nickel-plated-brass-air-compressor-tank-fill-valve\"\u003e1\/4\" NPT Nickel Plated Brass Air Compressor Tank Fill Valve\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/hex-shank-wire-twister-drill-attachment-rebar-tie-tool\"\u003e1\/4\" Hex Shank Wire Twister Drill Attachment | Rebar Tie Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on electrical safety and best practices for DIY electrical work, visit the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Resource\u003c\/a\u003e. You can also reference CPSC Electrical Safety Guidelines for consumer electrical product safety.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage range can this digital voltmeter measure?\u003c\/h4\u003e\n\u003cp\u003eA: This DC LED digital voltmeter can detect voltages from 0V to 40V DC. In 2-wire mode, it operates on a supply voltage of 4V to 40V, making it compatible with most common automotive and electronics applications including 5V, 12V, and 24V systems.\u003c\/p\u003e\n\u003ch4\u003eQ: Does this voltmeter work on a car or motorcycle battery?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! This voltmeter is well-suited for monitoring 12V automotive and motorcycle batteries. Simply connect the two wires directly to the circuit you wish to measure, and the bright LED display will show the current voltage in real time.\u003c\/p\u003e\n\u003ch4\u003eQ: Is installation difficult?\u003c\/h4\u003e\n\u003cp\u003eA: Not at all. The voltmeter uses a simple 2-wire connection — no separate power supply is needed. Cut a 23 × 10mm panel opening, insert the meter, and connect the red wire to positive and black wire to negative. The meter is powered directly by the circuit being measured.\u003c\/p\u003e\n\u003ch4\u003eQ: Does it have reverse polarity protection?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, the 2-wire version of this voltmeter includes built-in reverse polarity protection, helping to safeguard the unit if wires are accidentally connected incorrectly.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage range can this digital voltmeter measure?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This DC LED digital voltmeter can detect voltages from 0V to 40V DC. In 2-wire mode, it operates on a supply voltage of 4V to 40V, making it compatible with most common automotive and electronics applications including 5V, 12V, and 24V systems.\"}}, {\"@type\": \"Question\", \"name\": \"Does this voltmeter work on a car or motorcycle battery?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! This voltmeter is well-suited for monitoring 12V automotive and motorcycle batteries. Simply connect the two wires directly to the circuit you wish to measure, and the bright LED display will show the current voltage in real time.\"}}, {\"@type\": \"Question\", \"name\": \"Is installation difficult?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Not at all. The voltmeter uses a simple 2-wire connection — no separate power supply is needed. Cut a 23 × 10mm panel opening, insert the meter, and connect the red wire to positive and black wire to negative. The meter is powered directly by the circuit being measured.\"}}, {\"@type\": \"Question\", \"name\": \"Does it have reverse polarity protection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, the 2-wire version of this voltmeter includes built-in reverse polarity protection, helping to safeguard the unit if wires are accidentally connected incorrectly.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Fasteners \u0026 Electrical\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/collections\/fasteners-electrical\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"DC 5–30V LED Digital Voltmeter – 0.28\\\" Mini Voltage Tester\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/products\/dc-led-digital-voltmeter-5-30v-mini-voltage-tester\"}]}\u003c\/script\u003e","brand":"Zpaxo","offers":[{"title":"Blue no  adjustment","offer_id":54188996395318,"sku":"14:193#Blue no  adjustment","price":7.82,"currency_code":"USD","in_stock":false},{"title":"Red no  adjustment","offer_id":54188996428086,"sku":"14:175#Red no  adjustment","price":7.82,"currency_code":"USD","in_stock":false},{"title":"White  adjustment","offer_id":54188996460854,"sku":"14:173#White  adjustment","price":7.82,"currency_code":"USD","in_stock":false},{"title":"Green adjustment","offer_id":54188996493622,"sku":"14:29#Green adjustment","price":7.82,"currency_code":"USD","in_stock":false},{"title":"Green no adjustment","offer_id":54188996526390,"sku":"14:366#Green no adjustment","price":7.82,"currency_code":"USD","in_stock":false},{"title":"Yellow  adjustment","offer_id":54188996559158,"sku":"14:10#Yellow  adjustment","price":7.82,"currency_code":"USD","in_stock":false},{"title":"Blue  adjustment","offer_id":54188996591926,"sku":"14:350853#Blue  adjustment","price":7.82,"currency_code":"USD","in_stock":false},{"title":"Red  adjustment","offer_id":54188996624694,"sku":"14:350850#Red  adjustment","price":7.82,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/7774\/3158\/files\/S8df3930c00e34aac9c9037b344682209Q.webp?v=1783270338","url":"https:\/\/0i45ne-c8.myshopify.com\/products\/dc-led-digital-voltmeter-5-30v-mini-voltage-tester","provider":"Zpaxo","version":"1.0","type":"link"}