["DC 12V LED Digital Voltmeter Thermometer 0.28 inch Dual Displa Voltage Temperature Meter Monitor For Car Motorcycle\n\nFeautres:\nVoltage and Temperature Dual Display\nWaterproof work, Fully enclosed for shell design, it can still work normally after soaking in water for a short for time\n56*31mm 3-digit 0.28 inch LED digital tube display, compact size\n\nDirect measurement: \nMeasure battery voltage + display car temperature\nMeasurement: Avoid excessive use of electricity in the car, which affects starting the car.\nTemperature: Detect the temperature in the car and keep it comfortable\n\nSpecifications:\n【Product name】Double display waterproof meter\n【Measurement accuracy】±1V / ±1℃\n【Temperature Range】-20℃~150℃\n【Voltage Range】8~18V\n[Power supply mode] DC and DC two lines\n【Product introduction】Using a fully enclosed for shell design, it can display temperature and voltage values at the same for time, and directly measure without external auxiliary power supply\n\nPrecautions:\n1. The power supply voltage must be less than 18V\n2. This meter adopts LED display and requires a certain working current, so it cannot be measured higher than the internal resistance voltage, such as weak signal voltage and button battery.\n3. Pay attention to the wiring method, red positive and black negative. It cannot be reversed.\n\nPackage included:\n1 * Waterproof DC 12V Voltmeter Thermometer"]