Soondar&reg; Mini 12V/24V DC Digital Car Motorcycle Cigarette Lighter Voltage Electric Meter Socket Battery and Charging System Monitor With Blue LCD Digit Display Monitor Power mode: cigarette lighter style; USB Output: DC 5.0-5.1V;0-2.1A Voltage measuring range: DC 8-40V ( DC12V/24V Universal ) Function 1: car battery voltage monitoring,for 12V cars, SUV, 24V trucks, buses. Function 2: USB charger, for the charger of 0-2.1A cell phones, digital cameras, tablet pc and etc. Applicable Type: Support Apple/Android, suitable for IPhone/Ipad/Ipod