Note: After replacing the obstacle avoidance module, errors may appear. This is not a part issue. Clearing and calibration are required. Please check tutorials online. If you cannot perform this, do not purchase. Thank you. Do not purchase or attempt if lacking relevant expertise. Images for reference only. Actual part condition may vary. We specialize in drone repair parts and accessories, but please note: We do not offer repair services or technical support. Most components require professional installation/expertise. Non-technical users may encounter unexpected issues. Important Notes: Parts Condition: Majority are genuine salvaged components from used drones. Items vary in condition ? we perform basic functionality checks. Testing Limitations: Parts cannot be fully tested in isolation (require system integration). Compatibility/performance issues may arise during installation. Strong Recommendation: ** Install ONLY with guidance from a qualified technician. After-Sales Support: If you receive a defective part, contact us directly ? we'll resolve the issue promptly. Thank you for choosing us! May your beloved drones soar again soon.