The DJI Focus Pro Hand Unit features a built-in RF module and supports wireless communication with the DJI Focus Pro Motor from up to 160 meters away. It supports FIZ control over the focus, aperture, and zoom, and features real-time, stepless damping adjustment to balance comfort and precision. The hand unit utilizes the NP-F550 battery model commonly available on the market. The dimensions should be 71×38.6×21.1 mm (L×W×H). Make sure to purchase batteries according to these specified dimensions. Compatible With: DJI Focus Pro Motor DJI Ronin 4D* DJI Inspire 3* * Requires the DJI High-Bright Remote Monitor In The Box:DJI Focus Pro Hand UnitD-TAP to USB-C Power Cable (50 cm)Replaceable Focus Marking RingDocuments All DJI brand products are non-returnable after any packaging has been opened. If a DJI product has an initial manufacturer defect, the item may be exchanged within 7 days of original purchase. However, if there is any noticeable damage to the product, we cannot accept the exchange or return. If 7 days has passed since purchase, the defect should be addressed through the manufacturer's warranty: https://www.dji.com/support/product We apologize, but there are no exceptions to these conditions for DJI products.