100% brand new and high quality 2 in 1 design and double-color display can measure both voltage of car power source and temperature in car Voltmeter needed connect to car kit cigarette lighter， then can display car battery voltage on the screen， suitable for DC 12V cars and DC 24V trucks External temperature sensor can be bend for a proper angle to measure the car temperature correctly， measurement range is -10℃-80℃ Built-in fuse， guarantee the safety Item Type: 2 In 1 Car Kit Voltmeter Thermometer Material: Plastic Function: Car Battery Voltage And Car Interior Temperature Measurement Application: Car Cigar Lighter Suitable Car Battery: DC 12V Battery， DC 24V Battery Screen Mode: Red+Blue Double Color Display Size: 40mm/1.47in (φ) 75mm/2.95in (L) Measurement Accuracy: 1% Color: Black Package Included: 1* 2 In 1 Car Kit Voltmeter Thermometer