逐项兼容结论
Insta360 X4 Insta360 X Series USB-C Cable
已确认Insta360 X4 Insta360 Bullet Time Cord
已确认Insta360 X4 Insta360 Bullet Time Accessory
已确认Insta360 X4 Insta360 X Series Cold Shoe
已确认Insta360 X4 Insta360 X Series Upgraded Invisible Mic Cold Shoe (for RØDE Wireless GO)
已确认Insta360 X4 Insta360 X5 / X4 Air Invisible Mic Cold Shoe (for RØDE Wireless GO)
不兼容Insta360 X4 Insta360 X5 / X4 Air Quick Reader
不兼容Insta360 X4 Insta360 X4 Quick Reader
已确认Insta360 X4 Insta360 X3 Quick Reader
不兼容Insta360 X4 Insta360 X5 Utility Fast Charge Case
不兼容Insta360 X4 Insta360 X4 Air Utility Fast Charge Case
不兼容Insta360 X4 Insta360 X4 Fast Charge Hub
已确认Insta360 X4 Insta360 X3 Fast Charge Hub
不兼容Insta360 X4 Insta360 X2 Fast Charge Hub
不兼容Insta360 X4 Insta360 X5 Thermo Grip Cover
不兼容Insta360 X4 Insta360 X4 Thermo Grip Cover
已确认Insta360 X4 Insta360 X5 Standard Lens Guard
不兼容Insta360 X4 Insta360 X4 Air Standard Lens Guard
不兼容Insta360 X4 Insta360 X5 Premium Lens Guard
不兼容Insta360 X4 Insta360 X4 Air Premium Lens Guard
不兼容Insta360 X4 Insta360 X4 Premium Lens Guard
已确认Insta360 X4 Insta360 X3 Premium Removable Lens Guard
不兼容Insta360 X4 Insta360 X5/X4 Lens Cap
已确认Insta360 X4 Insta360 X3 Lens Cap
不兼容Insta360 X4 Insta360 X2 Lens Cap
不兼容Insta360 X4 Insta360 X5 Invisible Dive Case Pro
不兼容Insta360 X4 Insta360 X5 Invisible Dive Case
不兼容Insta360 X4 Insta360 X4 Air Invisible Dive Case
不兼容Insta360 X4 Insta360 X4 Invisible Dive Case
已确认Insta360 X4 Insta360 X3 Invisible Dive Case
不兼容Insta360 X4 Insta360 X5 Mic Windshield
不兼容Insta360 X4 Insta360 X4 Air Mic Windshield
不兼容Insta360 X4 Insta360 X4 Mic Windshield
已确认Insta360 X4 Insta360 X3 Mic Windshield
不兼容Insta360 X4 Insta360 X5 Utility Frame
不兼容Insta360 X4 Insta360 X4 Air Utility Frame
不兼容Insta360 X4 Insta360 X4 Utility Frame
已确认Insta360 X4 Insta360 X3 Utility Frame
不兼容Insta360 X4 Insta360 X5 Foldable Utility Handle
不兼容Insta360 X4 Insta360 X4 Foldable Utility Handle
已确认Insta360 X4 Insta360 X5 / X4 Air Mic Adapter
不兼容Insta360 X4 Insta360 X4 Mic Adapter
已确认Insta360 X4 Insta360 X3 Mic Adapter
不兼容Insta360 X4 Insta360 Mic Adapter (Vertical Version)
不兼容Insta360 X4 Insta360 X5 Carry Case
不兼容Insta360 X4 Insta360 X4 Air Carry Case
不兼容Insta360 X4 Insta360 X4 Carry Case
已确认Insta360 X4 Insta360 X3 Carry Case
不兼容Insta360 X4 Insta360 X5 Screen Protector
不兼容Insta360 X4 Insta360 X4 Air Screen Protector
不兼容Insta360 X4 Insta360 X4 Screen Protector
已确认Insta360 X4 Insta360 X3 Screen Protector
不兼容Insta360 X4 Insta360 X5 Cooling Screen Protector
不兼容Insta360 X4 Insta360 X4/X5 Dive Case Anti-Fog Insert
已确认Insta360 X4 Insta360 X5 Water Sports Rope Mount
已确认Insta360 X4 Insta360 X4 Air Water Sports Rope Mount
不兼容Insta360 X4 Insta360 X4 Water Sports Rope Mount
已确认Insta360 X4 Insta360 X3 Water Sports Rope Mount
不兼容Insta360 X4 Insta360 X5 All-Weather USB Charging Cover
不兼容Insta360 X4 Insta360 X4 Air All-Weather USB Charging Cover
不兼容Insta360 X4 Insta360 X5 / X4 Air Vertical-Horizontal Mount
不兼容Insta360 X4 Insta360 X4 Vertical-Horizontal Mount
已确认读卡器与充电条目独立判断
厂商列出 X4 Quick Reader 支持 X4，X3 Quick Reader 和 X5 / X4 Air Quick Reader 均不支持。这样可以直接回答具名读卡器问题，不需要从插头外观猜测。
X4 Fast Charge Hub 支持 X4，X5 Utility Fast Charge Case 不支持。应逐项查看具体配件，不要把一次成功配对推广到整套设备。
两个值得注意的跨代例外
表格支持 X5/X4 Lens Cap 用于 X4，也支持具名的 X5 Water Sports Rope Mount 用于 X4，即使后者名称写着较新型号。不能只凭名称就把这个明确结果改成不支持。
反过来，支架适配也不等于任何水上活动或承重都安全。适配表回答具名配件是否支持，操作限制仍需看配件自身说明。