{"product_id":"dc-5-30v-mini-led-digital-voltmeter-0-28-inch-panel-voltage-meter","title":"DC 5–30V Mini LED Digital Voltmeter | 0.28\" Panel Voltage Meter","description":"\n\u003ch2\u003eDC 5–30V Mini LED Digital Voltmeter — Compact Voltage Monitoring for Cars, DIY \u0026amp; More\u003c\/h2\u003e\n\u003cp\u003eThis ultra-compact \u003cstrong\u003e0.28-inch DC LED Digital Voltmeter\u003c\/strong\u003e gives you instant, accurate voltage readings across a wide 4V–40V range. Whether you're monitoring your car battery, checking a power supply, or integrating a live voltage display into your DIY electronics project, this panel-mount meter delivers clear, bright readouts in a tiny footprint. Made in Mainland China.\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 2-wire detection from 0–40V; operating range 4V–40V with built-in reverse-polarity protection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBright 0.28\" LED Display:\u003c\/strong\u003e Three-digit Nixie-tube style LED for easy reading in all lighting conditions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Refresh Rate:\u003c\/strong\u003e Measurement update every ~200ms for near real-time monitoring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Accuracy:\u003c\/strong\u003e ±3% measurement accuracy — reliable for automotive and DIY use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Draw:\u003c\/strong\u003e Working current under 20mA — won't drain your battery\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePanel-Mount Ready:\u003c\/strong\u003e Compact 30 × 11.7 × 9.2mm body with a 23 × 10mm installation cutout for flush mounting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e -10°C to +65°C — suitable for automotive engine bays, workshops, and outdoor installations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlastic Housing:\u003c\/strong\u003e Lightweight and durable for long-term use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3-digit 0.28-inch LED\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\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e2-Wire Detection Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0V – 40V\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\u003eDimensions\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\u003eInstallation Cutout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e23 × 10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating 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\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\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\u003eGreat For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCar \u0026amp; motorcycle battery voltage monitoring\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and Arduino projects\u003c\/li\u003e\n  \u003cli\u003eSolar panel and power bank voltage display\u003c\/li\u003e\n  \u003cli\u003eWorkshop power supply monitoring\u003c\/li\u003e\n  \u003cli\u003eRC vehicles and hobby battery packs\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\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-100mm-tiny-digital-vernier-caliper-portable-measuring-tool\"\u003e0–100mm Tiny Digital Vernier Caliper | Portable Measuring Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-160-psi-liquid-filled-fuel-pressure-gauge-1-8-npt-an6-9mm-hose\"\u003e0–160 PSI Liquid-Filled Fuel Pressure Gauge | 1\/8 NPT AN6\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on electrical safety when working with vehicle electrical systems, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Voltmeter\" target=\"_blank\" rel=\"noopener\"\u003eVoltmeter\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage range does this digital voltmeter support?\u003c\/h4\u003e\n\u003cp\u003eA: This DC LED digital voltmeter operates on a 2-wire system with a working voltage of 4V–40V and a detection range of 0V–40V, making it suitable for 12V car batteries, 24V systems, and a wide variety of DIY power projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this voltmeter have reverse polarity protection?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The 2-wire configuration includes built-in reverse-polarity protection, helping to safeguard both the meter and your circuit in case of an accidental wiring mistake.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I install this panel voltmeter?\u003c\/h4\u003e\n\u003cp\u003eA: Simply cut a 23 × 10mm opening in your panel or enclosure. The meter body (30 × 11.7 × 9.2mm) slides in and can be secured in place. Connect the two wires to your DC power source and the display lights up immediately.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this voltmeter suitable for use in a car?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. This meter is designed for automotive applications — it works perfectly for monitoring 12V car or motorcycle battery levels. Its compact size and low current draw (under 20mA) make it ideal for dash-panel or under-bonnet installations.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage range does this digital voltmeter support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This DC LED digital voltmeter operates on a 2-wire system with a working voltage of 4V–40V and a detection range of 0V–40V, making it suitable for 12V car batteries, 24V systems, and a wide variety of DIY power projects.\"}}, {\"@type\": \"Question\", \"name\": \"Does this voltmeter have reverse polarity protection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! 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Its compact size and low current draw (under 20mA) make it ideal for dash-panel or under-bonnet installations.\"}}]}\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:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"DC 5–30V Mini LED Digital Voltmeter | 0.28\\\" Panel Voltage Meter\", \"item\": \"https:\/\/oasis-select.com\/products\/dc-5-30v-mini-led-digital-voltmeter-0-28-inch-panel-voltage-meter\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"Blue no  adjustment","offer_id":47755584372841,"sku":"14:193#Blue no  adjustment","price":7.8,"currency_code":"USD","in_stock":true},{"title":"Red no  adjustment","offer_id":47755584405609,"sku":"14:175#Red no  adjustment","price":7.8,"currency_code":"USD","in_stock":true},{"title":"White  adjustment","offer_id":47755584438377,"sku":"14:173#White  adjustment","price":7.8,"currency_code":"USD","in_stock":true},{"title":"Green adjustment","offer_id":47755584471145,"sku":"14:29#Green adjustment","price":7.8,"currency_code":"USD","in_stock":true},{"title":"Green no adjustment","offer_id":47755584503913,"sku":"14:366#Green no adjustment","price":7.8,"currency_code":"USD","in_stock":true},{"title":"Yellow  adjustment","offer_id":47755584536681,"sku":"14:10#Yellow  adjustment","price":7.8,"currency_code":"USD","in_stock":true},{"title":"Blue  adjustment","offer_id":47755584569449,"sku":"14:350853#Blue  adjustment","price":7.8,"currency_code":"USD","in_stock":true},{"title":"Red  adjustment","offer_id":47755584602217,"sku":"14:350850#Red  adjustment","price":7.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S8df3930c00e34aac9c9037b344682209Q.webp?v=1783270340","url":"https:\/\/oasis-select.com\/products\/dc-5-30v-mini-led-digital-voltmeter-0-28-inch-panel-voltage-meter","provider":"Oasis Select","version":"1.0","type":"link"}