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Compact 12V/24V car gauge with LCD display, USB port and flexible temperature probe

12V/24V 3-in-1 Car Gauge

SKU CH-3CTS-AYN27

Plugs into a 12V or 24V cigarette lighter to show battery voltage and cabin temperature while charging devices at 2.1 A

  • Monitors battery voltage 12V/24V to prevent failed starts
  • Charges devices via USB 5V 2.1A port
  • Measures interior temperature -10 to 80°C with flexible probe
  • LCD shows real-time voltage and temperature for safety
  • Built-in fuse protects against overcurrent and short circuits

3-in-1 Car Gauge with Voltage.

This gauge combines a voltage meter, interior thermometer and USB charger in one cigarette-lighter plug. It suits drivers who want real-time battery health and cabin temperature without extra wiring. The external probe delivers accurate readings while the USB port keeps phones, GPS units or tablets powered on the move.

Monitors 12 V–24 V systems and -10 °C to 80 °C range

The voltmeter tracks battery voltage continuously and flags drops below 12.5 V so you can reduce load before a no-start situation. Temperature measurement covers -10 °C to 80 °C via the flexible external sensor. The USB port supplies 5 V at 2.1 A, sufficient for most phones and small tablets but not for high-draw laptops or multiple power-hungry devices simultaneously.

Compact plug-and-play design

The miniature housing fits flush in standard lighter sockets without blocking adjacent controls. An external probe on a bendable lead lets you route the sensor away from hot components or direct sunlight for accurate cabin readings. A built-in fuse guards against overcurrent, overload, overheating and short circuits, while an intelligent control chip manages power delivery safely.

How it compares

Measured against everything we stock in Gauges & Tachometers, at today’s prices. Recalculated every night.

Price $22.99
Cheaper than about 75% of the 193 comparable items (median $35.99).

Specifications

No published specifications for this item yet.

Questions about this item

Will the 12V/24V plug work in my older truck that only has a standard cigarette lighter socket?

Yes, the gauge plugs directly into any standard cigarette lighter socket and supports both 12V and 24V electrical systems found in older trucks, SUVs and buses.

How can I verify the voltage reading is accurate once I plug it in?

The LCD shows real-time battery voltage; if it reads below 12.5 V while the engine is off, the monitor is correctly flagging a low-charge condition.

Does the package include the external temperature probe or do I need to buy it separately?

The external temperature probe is built into the unit with a soft, flexible cable that can be bent away from hot components, so no separate sensor purchase is required.

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