The HobbyKing 3-Channel Video Switcher is a great accessory for any FPV model. It allows you to easily switch between up to 3 cameras by using a switch on your transmitter. It features one receiver input, 3 camera inputs and one video output. Features:• Compact and lightweight design• Switch between 3 cameras from your transmitter• Simple to use• Perfect for FPV modelsSpecs:Dimensions: 30x18x6mmWeight: 4g