The PV6I is a PowerVerter 1-output board-mount Voltage Converter offers a convenient way to operate mass produced 12VDC equipment such as cell phones, in car entertainment, professional communication and telematics equipment, refrigerators, televisions from the 24VDC mobile electrical systems found on diesel engine vehicles and vessels. There are no ventilation holes to permit stray objects, dust or water droplets to enter the case. There are no external fuses to be tampered with. Fuses will only blow if there is a fault so there is no need to make them accessible.