LED ON/OFF/ Flash Speed Styple Light Mode Controller For All FC F450 F330 F550 S500 S550 Description Input Voltage: 5 V Features 3 operation modes: ON/ Flash/OFF.LED flash speed & style can be controlled. Operation Mode Light on: For all FCs. 5V input. Universal flash: for all FCs. ON/ Flash/OFF, 3 working status can be controlled. In flash mode, speed & flash style can be set. Package Included 1 x Controller