Tonsiki Motor Car Truck Boat DC Digital Voltmeter Three Hole Panel DC 12V Cigarette Lighter Power Socket Dual USB Port Panel assembly with voltmeter, USB charger an d 12 volt socket. Voltage Meter: Operating Range: DC 4-24V Display:Red LED,Digital display USB Charger Output: DC 5V 1A / DC 5V 2.1A USB Charger Interface: 2