Feature 1Made of high quality aluminum panel and environmental anti-retardant materials ,CE certified good quality design, perfect for your machine. 2Built-in overload, over-current and short circuit protection, very safe to use. 3Voltmeter with LED digital display, real time monitor the battery voltage. Measuring DC voltage, with anti-reverse, short circuit protection. 4Waterproof casing will protect the switch from rain or coffee spill. 5Mounting screw included, easy to install, can be installed horizontally or vertically.Features: Made of high quality aluminum panel and environmental anti-retardant materials ,CE certified good quality design, perfect for your machine. Built-in overload, over-current and short circuit protection, very safe to use. Voltmeter with LED digital display, real time monitor the battery voltage. Measuring DC voltage, with anti-reverse, short circuit protection. Waterproof casing will protect the switch from rain or coffee spill. Mounting screw included, easy to install, can be installed horizontally or vertically. Use on automotive electronic field, electrical devices, most car,truck, buses, SUV, boat, camper/RV, ATV, UTV, golf cart, and more electrical devices. Specification: Material: ABS + PBT + PC Item Color: Black Operating Voltage: DC12V 20A, DC 24V 10A Operating Temperature: -25 ~ 80 Voltmeter Display Range: 5V-15V Fitment: Universal Package list: 1 * Rocker Switch Panel with Voltmeter(As picture shown) 4 * Screws