DJI Focus Pro All-in-One Combo AMF Lens Control System, up to 20m range, 76,800 focusing points, AI recognition, FIZ lens control, and includes a hand unit. As a bonus, I will include the DJI RS BG21 battery, which is also used for the Ronin. I purchased this new on Amazon and used it only once for testing, so it's practically new. This is a revolutionary product that allows you to use manual lenses, such as cinema lenses, with autofocus. While the appearance may lack a sense of luxury, I didn't feel a difference in performance compared to follow focus systems like the Arri Hi5, which cost hundreds of thousands of yen, so I think the cost performance is very good. I had no problems with communication interruptions during testing. Thank you.