- Discover top-quality sockets and accessories for your semi truck, including the latest LED 3.1A Dual Port USB Socket, Dual Port USB Socket with Blue LED Voltmeter, and 12V DC Marine Voltmeter. Our extensive range features socket-sized dual port USBs with blue LEDs, rocker switch-sized marine dual voltmeters, and socket-sized dual DC voltmeters with dual digital displays. Enhance your vehicle's electrical system with DC voltmeter sockets, marine dual port rocker switches with USB and AUX ports, and electrical sockets with zinc die-cast housing. Perfect for marine and automotive applications, our cut-out tent mounts and rear panel mounts for round digital voltage gauges ensure easy installation. Choose from digital voltmeter round gauges with LED lighting, rocker panel-sized dual port USBs with LED voltmeters, and blue LED ATV and Jeep whip flag poles. We also offer single and two-pole sockets, 10GA general-purpose primary wire, seven-way circuit breaker sockets and adapter boxes, truck tractor to trailer adapters, seven-way zinc circuit breaker sockets, and TPHD 7-way trailer sockets with 20 or 30 amp breakers. Equip your semi truck with reliable, high-performance electrical components designed for durability and efficiency. Explore our collection today and upgrade your vehicle's electrical system with the best in the market!