This multifunctional combination USB car charger with voltage display is designed for cars, RVs, and boats. It features a central control switch for easy operation. The sleek design integrates seamlessly into your vehicle's dashboard, providing a convenient and efficient way to charge your devices while monitoring battery voltage. Features -Color:Black -Material:ABS -Size:15.00X7.00X4.20cm/5.89X2.75X1.65in -Dual usb charging: equipped with dual usb ports, this charger allows you to charge two devices simultaneously, ensuring your gadgets are always on the go -Wide voltage compatibility: supports 12v-24v input, making it suitable for a variety of vehicles including cars, rvs, and boats, providing versatile charging options -Central control features a central control switch for easy and convenient operation, allowing you to manage power distribution with a simple touch -Voltage display: comes with a builtin voltage display that provides monitoring of your vehicle's voltage, helping you keep track of your battery status -Multifunctional design: designed with multiple functions to meet different needs, this combination unit is ideal for those who require a versatile Package list: 1 x switch control 4 x screws 6 x blue accessories