About this item Full 3K Carbon Fiber airframe featuring a solid 4mm removable fpv frame arms. Upgrade the lower board to 2mm,much stronger than before. Easy Lipo Access (suggested Lipo is a 1550mah&2300mah 3 or 4s). Support to carry HD camera (such as the GoPro 4, runcam 2, or GoPro Session) If you need replacement arms,ASIN: B07BVBL885.