The Godox AD400Pro 400W Witstro All-In-One Outdoor Flash is similar to the larger Godox AD600Pro with a sleeker design. The length is only slightly longer than the AD200, however, it is packed with the same features as the AD600Pro with slightly less output at 400Ws. The Bowen S-type adapter is no longer built-in, however, it is provided with the flash to maintain its smaller form factor. You're able to mount different flash modifier mounts included Profoto, Broncolor and Elinchrom should you use lighting modifiers and softboxes from different lighting systems. The AD400Pro is a versatile and all-in-one solution for flash photographers. It's compatible with several TTL systems including Canon, Nikon, Sony, Fujifilm, Olympus, Panasonic and Pentax. It provides up to 400W of output with nine steps of power, ranging from 1/1 to 1/256, and comes with a powerful 2600mAh / 21.6V lithium-ion battery pack that provides up to 390 full-power flashes, perfect for outdoor or on-location shooting. Alternatively, you can run the monolight on AC power with an optional adapter.   Features 400ws in the most well thought out design Solid Guide Number of 72m (236ft) (ISO 100, included reflector) Lightning fast 0.01 - 1 Second Recycle Time Reliable and brilliant Godox 2.4GHz X-System Radio Receiver built in Auto-Sensing and Switching Radio Slave Modes for Canon, Nikon. Sony, Fuji, and Panasonic/Olympus M4/3 100m (328ft) Wireless X-System signal reception range Up to 390 Full Power Flashes Per Battery Charge Rear latching interchangeable 21.6V / 2600mAh Lithium-ion Battery Manual Flash over 9 Stops: 1/256 - 1/1 Output (1/3rd Increments) Flash Modes - TTL Flash / M / Multi 5 Groups keep the pace and the peace - A / B / C / D / E 32 Channels protect the isolation of the signal High Speed Sync to 1/8000th second Advanced IGBT circuitry for stable and precise flash duration Last Shot Auto Memory Function Second Curtain Sync FEC / FEB - 1/3rd Increments (±3 Stops) FEL (Flash Exposure Lock) 99 Wireless ID's for ultimate security S1 Standard & S2 'Smart' Optical Slave Modes IGBT inspired Flash Duration with 1/220s - 1/12820s (T0.1) Professional balanced Colour Temperature at 5600°K ± 200°K Stable Colour Mode narrows to variable down to ±75°K 30W LED Modelling Light (4800°K / TLIC: 93) (M / Prop) Native Godox Modifier Mount Bowens S-type Interchangeable Mount Adapter Optional Remote Head brings the light where you want it Optional AC Power Adapter for nonstop flash power Quiet Fan Cooled mechanism Large Dot Matrix LCD Display An Abundance of Custom Functions Type C USB Port for Firmware Upgrades 3.5mm Sync Port for manual sync connection Sleek measurements 8.6x4.0x5.0in / 220x102x128mm with Battery (No Flash tube or reflector) Light Weight Heavyweight at 2.1kg (4.6lb) with Battery (No flash tube or reflector)   Specifications   Maximum Power 400 Ws Power Control 9 Stops in 1/3-Stop Increments Guide Number (m ISO100) 72 m at ISO100 with Reflector Flash Duration 1/240 to 1/12,820 Sec Recycle Time 0.01 to 0.9 Sec (Full Power) Burst Rate 100 fps Color Temperature 5600K ± 200K Accessory Fitting Type Bowens S Type Modeling Light  LED Wattage 30 W Color Temperature 4800K Sync Type Button, Cable, Optical, Radio Sync Speed 1/8000 Sec (High-Speed) Wireless Frequency Bands 2.4 GHz Wireless Channels / Groups 32 / 5 Wireless Range 100 m (Radio) Interface USB Type-C Delay Range 0.01 to 30 Sec Power Source  AC Adapter, External Battery Battery Chemistry Lithium-Ion Maximum Output Voltage 21.6 VDC Capacity (mAh) 2600 mAh Flashes Per Charge 380 Flashes (Full Power) What's Included 1x Godox AD400Pro Flash Unit 1x AD400Pro 400W Flash Tube 1x Bowens Reflector / Cap Protector 1x Bowens Adapter Speed Ring 1x Battery 1x Battery Charger 1x Allen Key 4x Mounting Screws 1 x Carry Bag