TOTAL MARINE MARINE BOAT RV DUAL USB SOCKET CHARGER INPUT 6-30V WITH USB COVER 3.1A 1 PIN all phones, tablet PCs charging and automotive electrical use. All vehicles of 6V-30v can be installed to use. with a waterproof cover when not in use, the cover is waterproof and dustproof. Large current dual USB car charger, large capacity. USB cover x 1 2 Port USB socket x 1. Input: 6V-30V DC. Output: 5V 5% 3.1A DC Size of Drill: 37.2 x 21.2 mm (1.46" x 0.83")