Features: brand new and high quality Automatically output current and voltage according to the power loss of the device, effectively extending the battery life of the mobile phone. Avoid short circuit, overvoltage, overcurrent and other safety hazards at the moment of ignition and during charging. The appearance is delicate and textured, Suitable for 12-24V for cars. Made of firepeoof material, safe and durable in use. Easy to install, multifunctional: 6 Toggle switches, dual USB charger, cigarette lighter socket and LED voltmeter. USB port can charge phones, tablets, cameras, GPS, wireless headphones, etc. Voltmeter help you keep an eye on battery voltage, maintenance of the battery, extended battery life. Specifications: Material:ABS Size:Approx.17.2x10cm/6.77x3.94inches Color:Blue/Green/Red Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x 6 Gang Rocker Switch Panel