The Hahnel Modus 600RT Wireless Flashgun + VIPER Transmitter Kit for FUJIFILM consists of a Hahnel Modus flash, a Hähnel MD1 Extreme battery with charger and a Viper TTL transmitter, for Fuji X-series of mirrorless camera systems. This set is suitable for external flashes, like strobe photography. The flash from this kit has a built-in radiographic receiver. As a result, it can be controlled by using the TTL Viper transmitter. With this kit you can control an unlimited number of flashes in three independent groups and it also assures that you have sufficient flashlight in every situation. Hähnel Modus flash The Hähnel Modus flash has a guide number of 60 at 100 ISO. In addition, you benefit from a super-fast charging time and thus the flash is always ready for use. While, using the 600RT you can continue to use all the functions of your camera flash. In addition, you can enjoy an extra long usage time thanks to the Extreme MD1 Lithium-Ion battery and the ability to shoot up to 550 shots with a maximum flash power. Hähnel Viper TTL Transmitter This transmitter is a wireless flash trigger that supports all controlled functions from the camera. Think about TTL synchronization, flash lighting correction and synchronization on the second shutter curtain. The Hähnel Viper TTL transmitter is easy to use, it is powered by AA batteries and supports the original Fujifilm TTL flashes. With the transmitter you control up to three different groups of multiple receivers. In addition, the trigger has a range of over 100 meters which ensures reliable control of your flash. In addition, Digital Channel Matching prevents that the TTL-channel collect signals from other wireless applications within the range of the Viper TTL.