Godox TT600 Speedlite Flash with Built-in 2.4G Wireless Transmission for Canon, Nikon, Pentax, Olympus and Other Digital Cameras with Standard Hotshoe The number of flashes is about 230(2500mA NI-MH battery). Full flash recycle time is up to 0.1-2.6s(Use Panasonic eneloop batteries). High Guide Number: GN60(m ISO 100), short flash duration, high illumination, far Irradiation distance. Stable color temperature at 5600200K over the entire power range. Adopts Godox wireless X system with built-in 2.4G wireless transmission, Godox AD360II-C/AD360II-N flash, TT685C TT685N flash, X1T-C/X1T-N trigger and other devices that with wireless control system. High-speed Sync: Can realize HSS when used with Godox Cell-II trigger or X1C/X1N TTL wireless trigger (Sold Separately), the max speed can up to 1/8000s (Depend on the cameras). It's particularly convenient when using the aperture to fill flash on portrait preferentially. Note: The TT600 can NOT realize HSS when used on camera hot shoe. Both Optic Transmission and 2.4G Radio Transmission available, offers more stable signal, farther distance, wider range of application, less power consumption, less affected by the obstacle. 32 Channels 5 Groups A / B / C / D / E Flash Duration: 1/3001/20000 seconds Transmission Range(approx.): 100m Manual Flash  1/128  1/1 Output Control (1/3rd Increments) Built-In 2.4GHz X Wireless Radio System Guide No.(1/1 power @ 200mm): GN 60 (m ISO 100) Zoom Range: 24-200mm (14mm with Panel) Tilts from -7 to 90 Rotates Left &amp; Right 180 Wireless Master/Slave Functionality Recycle Time: 0.1-2.6 Seconds 3.5mm Sync Port; Wireless Control Port Runs on Four AA Batteries High-Speed Sync via Optional Transmitter S1 and S2 Optic Slave Modes 230 Full Power Flashes (using 2500mAh Ni-MH Batteries) High Guide Number: GN60(m ISO 100), short flash duration, high illumination, far Irradiation distance. Adopts Godox wireless X system with built-in 2.4G wireless transmission, Godox AD360II-C/AD360II-N flash, TT685C TT685N flash, X1T-C/X1T-N trigger and other devices that with wireless control system. Flexible illumination angle adjustment: Vertical Rotation Angle:7 to 90 Horizontal Rotation Angle: 360 Stable color temperature at 5600200K over the entire power range. Can realize HSS when used with Godox Cell-II trigger or X1C/X1N TTL wireless trigger (Sold Separately), the max speed can up to 1/8000s (Depend on the cameras). It&#039;s particularly convenient when using the aperture to fill flash on portrait preferentially. In M manual flash mode, this flash can function as an optic S1 secondary flash with optic sensor. With this function, the flash will fire synchronously when the main flash fires, the same effect as that by the use of radio triggers. This helps create multiple lighting effects. The flash can also function as an optic S2 secondary flash with optic sensor in M manual flash mode. This is useful when cameras have pre-flash function. With this function, the flash will ignore a single &#034;preflash&#034; from the main flash and will only fire in response to the second, actual flash from the main unit. Fresnel lems Wide panel Catchlight panel Power Supply: Ni-MH batteries (recommended) or 4*LR6 alkaline batteries. The number of flashes is about 230(2500mA NI-MH battery). Full flash recycle time is up to 0.1-2.6s(Use Panasonic eneloop batteries) Dot-matrix LCD panel with clear and convenient operation. Based on rigorous optical research and design, producing uniform light distribution and the same brightness on four corners. Follow the pace of the original plant and the software can be upgraded. Compatible with Godox X1-c and X1-N TTL Transmitter &amp;Receivers