3in1 LED Digital Voltmeter Thermometer 12V 24V Cigarette Lighter USB Car Charger
USB output: 5V/ 2.1A. Multifunctional car LCD digital display; easy to install without professional skills;. Display: digital display. Installation position: car interior. Net weight: 33g. Product size: 75 x 47 x 47mm/2.95 x 1.85 x 1.85".