Introducing the Sunrise Siskin 4 In 1 31A BLheli 32! This little powerhouse offers only the smoothest control along with great reliability. We have tested it extensively with the RaceFlight flight controller with spectacular results! The 12V BEC is accessed by the solder pads at the back of the board, while the 5V BEC is used through the wire harness. The Siskin is more compact than most other 4 in 1's of this amp rating and remains light in weight.