【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 in electronic fields for vehicles, appliances most cars, trucks, buses, homes, boats, caravans, RVs, ATVs, UTVs, golf carts and other electrical appliances. 【High compatibility】 Can be used to charge mobile phones, tablets, GPS, digital cameras, PDAs, etc. 【Durable and safe】 CE RoHS certified with overcharge, overcurrent and short circuit function that guarantees charging safety, protects your vehicle and electrical appliances from short circuit or overload. 【Waterproof and dustproof】 With a waterproof cover, it works well in high and low temperature environments (-20 °C to 60 °C). It is durable and flame retardant, high temperature and abrasion resistant. Quantity: 1x panel base 4x mounting screws 9x insulated terminals