Matek Systems 5 in 1 PDB 5V 12V BEC Lost Plane Tracker LED Lighting Control Low Voltage Alarm for Multirotor Quadcopter ( Version 3 ) It is specially made for the Multi-Rotors, mini FPV Quad. Simplify wiring. Built-in 5V BEC can be connected to receiver or flight controller with Aux pins directly. Inbuilt LED light controller, three flash modes can be chosen with the toggle switch of transmiter. And the buzzer can also be triggered with the toggle switch, which can help you find the models in tall grass or trees.