ITEM NAME:12V / 24V Fast Charging 4.2A Car Cigarette Lighter Socket Double Usb Charge F6Y3 12V / 24V Fast Charging 4.2A Car Cigarette Lighter Socket Double Usb Charge F6Y3 The color screen display and digital display clearly show the voltage. Used to monitor battery voltage with reverse connection protection. Keep abreast of the battery status between charging and discharging. Waterproof design, mini size, very easy to install Universal for most DC12V 24V motorcycles / boats / ATV / UTV / camper / caravan / travel trailer, etc. Material: ABS Power input: DC12V-24V Output current: 4.2A (2.1A + 2.1A) Output voltage: 5V Color: black + green Measurable voltage: 6V-36V Output interface: dual USB interface Working temperature: -20-80 ( °C) Suitable for: DC12V-24V car, motorcycles, boats Package contents: 1 * USB car charger 2 * blue terminal