1/8000 second

Model : Godox AD400 Pro
Built-In 2.4 GHz Wireless X System
Compatible with Most TTL Systems
400Ws, 1/256 to 1/1 Power Output
Lithium-Ion Battery Powered
Up to 390 Full-Power Flashes
Flash Duration: 1/240 to 1/12,820 sec
1/8000 sec High-Speed Sync
0.01-0.9 sec Recycling Time
30W LED Modeling Lamp, 4800K, TLCI: 93
Stable Color Temperature Mode