Features:
Item:5V 3A BEC
Mini BEC:Light and compact
Output Voltage: 5V / 3A
Input: 6V-25.2V (2-6 cells Li-Po battery pack or 5-15 cells Ni-MH battery pack)

Lightweight and compact
Size: 51mm X 15mm X 8.5mm
Weight: 10g
Continuous output current: 3 Amps
It is designed to power cameras and servos. You can move the blue jumper to go from 5v to 7v.

Function of the Green loop :
RF choke to prevent interference;helps with static in antennas for other devices if the wires are near each other on your build
With green toroidal core. They are supposed to reduce the ripple in the DC output.
Digital switching regulators and all have ripple (noise) in the DC output.

Applications:
1.Used to power multiple items on a Robotics project
2.Fits for Raspberry Pi Naze32 Drone ,Osd, Lights, Flight Controller, Sailboat etc.
3.Ideal for RC Quadcopter Airplane FPV Camera Servo Receiver Power Supply

Package includes:
2Pcs FPV 5V 3A UBEC

Note：Test the voltage end before plugging in.