HDZero Halo Stack H7 Flight Controller and 70A 3S-8S 4IN1 ESC 20x20mm - Choose VersionThe HDZero Halo Stack combines the Halo Flight Controller and Halo 4in1 70A ESC into a race ready powertrain, engineered by HDZeroleaders in high performance digital FPV systems. Designed for power, reliability, and ease of assembly, this stack is the ultimate solution for competitive racing and freestyle pilots. With its clean layout, minimal wiring, and integrated components, the HDZero Halo Stack is the easiest way to build a professional grade