Refurbished Roll Motor ESC Chip Board designed for DJI Phantom 3 Advanced and Professional models. This electronic speed controller board regulates power to the roll motor, ensuring stable flight dynamics and precise aircraft control. Fully tested and restored to working condition, offering a cost-effective replacement for damaged or malfunctioning original components. Compatible with both Phantom 3 Advanced and Professional variants. Ideal for drone enthusiasts and professionals seeking reliable repair solutions without premium pricing.