Designed for versatility, this USB car charger with voltage display is suitable for use in cars, RVs, and boats. The central control switch allows for easy operation, while the dual USB ports provide ample charging options for your devices. The voltage display ensures you can monitor your battery's health, giving you peace of mind during your travels. Features -Color:Black -Material:ABS -Size:15.00X7.00X4.20cm/5.89X2.75X1.65in -Charge two devices: with dual usb ports, you can charge two devices simultaneously, ensuring your essential gadgets are always -12v-24v compatibility: supports a wide range of voltage inputs, making it suitable for various vehicles including cars, rvs, and boats - management: the central control switch offers convenient power management, allowing you to control the power supply with a simple touch -Monitor vehicle voltage: the builtin voltage display provides monitoring of your vehicle's voltage, helping you keep track of your battery status -All-in-one design: this multifunctional unit combines several features to meet different needs, making it a versatile for any vehicle Package list: 1 x switch control 4 x screws 6 x blue accessories