【Products Include】 This four-hole panel includes 2 USB charging sockets (DC 5V/4.2A) + LED voltmeter (display range: 6-24V) + 12V power socket (DC 12V) + ON/OFF rocker switch, they are interchangeable.【Wide Range of Applications】 Use on automotive electronics fields, electrical appliances, most cars, trucks, buses, homes, boats, caravans, RVs, ATVs, UTVs, golf carts and other electrical appliances.【High Compatibility】 Can be used to charge cell phones, tablets, GPS, digital cameras, PDAs, etc.【Durable and Safe】 Overcurrent and short circuit protection that ensures charging safety, protects your vehicle and electrical appliances from short circuit or overload.【Waterproof and Dustproof】 With a waterproof cover, it works well in harsh environments. high and low temperature (-20°C to 60°C). It is durable and flame retardant, resistant to high temperatures and abrasion.