MATEK UBEC :

This device is a high-efficiency, switch-mode buck regulator with two output channels, works with 7~26Vdc input. One output channel is capable of supplying 0~4A/5V for your RX or Flight Controller. This device also features another output channel with 4A & 5~12V (adjustable), inbuilt power switch that is operated by a spare Aux Channel, this feature can also be used to power and switch on/off a wide variety of electric equipment.