Feature: 1. Smart Design: Battery box with battery quick connector and 50A fuse, 12V power outlet, digital voltmeter display, dual USB socket, circuit breaker switch, versatile and practical. 2. High Performance: Outdoor car 12V portable battery box with USB port and voltmeter, professional design and stable performance bring you an excellent using experience. 3. Weatherproof Box: The upgraded smart battery box is windproof, rainproof and dustproof, and able to be used in various harsh environmental conditions. 4. Impact Resistant: Battery box is made of high strength ABS housing, which enables the box to withstand shock and is not affected by gases, oils, and UV rays. 5. Wide Application: The battery box with circuit breaker can be safely and easily connected to the battery port without opening the box, widely used in RV, SUV, ATV camper, truck, motorcycles. Specification: Item Type: Battery Box.Material: ABS1. Switch control colorful LED voltmeter (11.3-1 1.9V red,12.0-12.5V yellow,12.6-13.2V green with flash) 2. Dual USB port (12V/24V 2.4A/2.4A) 3. Positive and negative terminals 4. Power socket (1 2V/24V) 5. Switch with 16A circuit breaker 6. Solar charging high current waterproof interface, built in 50A fuse box, box size 350x200x200mm/13.77x7.87x7.87in, suitable for most 100Ah batteries., 24in battery pack. The maximum battery capacity is 115Ah. Scope of Application Widely used in RV SUV ATV camper truck motorcycle, convenient connection of various DC accessories. Package List: 1 x Battery Box1 x Fastening Strap 1 x Package of Accessories Note: The positive and negative terminals on the outside of the battery box do not have fuses, make sure to install fuses or circuit breakers if necessary.