The Master 3X Modular Frame features a refined version of the classic modular design. The standalone VTX unit helps reduce costs and is compatible with the Bee25 and other models, offering greater building flexibility than ever before. Its unique balanced head lock ensures that the props remain clear during flight, allowing for confident maneuvers without the risk of strikes. The new X-frame design has a low center of gravity, providing stable and sharp control that feels just right! Specifications: Wheelbase: 171mm Top Plate: 2.0mm Middle Plate: 2.0mm Bottom Plate: 2.0mm Arms: 4.0mm Camera Pitch: 19/20mm Stack Height Supported: 11mm Stack Mounting Holes: 25.5*25.5mm Compatible VTX: O4 Pro Propeller Size: 3-3.6 Inches Motor Mounting Holes: 9-12mm Weight: 87+/- 2g (without head) Recommended Motor: 1507/1804/2004/2006/2105.5 Recommended KV: 4S 3000KV-3600KV, 6S 2200-2750KV Max Battery Size: 67mm (L) x 31mm (W) x 40mm (H) Recommended Battery: 4S LiPo / LiHv 750mAh-1100mAh, 6S 65-850mAh GPS Supported Size: 18.1*18.1mm Includes:1x Speedy Bee Master 3X 3-Inch O4P Modular Frame Kit Download Manual