1. The DJI SDK Certified Chip is a hardware security mechanism provided by DJI for SDK accessories 2. The certified chip ensures compatibility between accessories and DJI Matrice series drones 3. The chip incorporates security algorithms to ensure data transmission security, prevent data leaks, and defend against malicious attacks 4. Package contents: DJI SDK Certified Chip x 50pcs 5. Compatible products: DJI Matrice 4D series, DJI Matrice 4 series