The Wireless Flash RF60 is a portable flash that has a built-in wireless transmitter + receiver – THREE things combine into one. With a transceiver built-in, the RF60 can receive wireless triggering signal from a flash trigger & fire accordingly without having to attach an external receiver to the flash. When using with Cactus V6, both power output & zoom level of the RF60 can be adjusted remotely by Cactus V6. Also because of the built-in transceiver, the RF60 itself, without anything attach to it, can function as a commander to control other RF60s. If you place an RF60 on a camera hot shoe, you can wirelessly control other off-camera RF60s without using ANY flash trigger at all. Built-in wireless commander & receiver: The Cactus RF60 is a 2.4 G Hz radio-based wireless portable flash with a built-in transceiver that runs on 16 channels. It operates in three modes, Local for on-camera operation, Master & Slave modes for off-camera. To act as a commander, set an RF60 to Master & it can trigger an unlimited number of RF60 set in Slave mode. The effective distance between the Master RF60 & Slave RF60 is up to 100m (328 feet). Remote control of power & zoom levels: The power levels of the RF60 set in Slave mode can be adjusted from 1/128 to 1/1 full power in steps of 0.3EV. Zoom level can also be controlled from a wide 24mm zoom to 105mm. With remote power & zoom control, you can place the RF6 units in hard-to-reach places & control its power & zoom level wirelessly. Group control of up to four groups with configurable Group Alias: In a typical lighting setup, the ability to adjust, activate & deactivate groups of lights is vital in creating the desired lighting effect. The RF60 can be configured into four distinct groups. Power output can be adjusted in individual group or in all groups at the same time for fast adjustments. To streamline the shooting experience, user can rename each group to: KEY, FILL, SPOT, RIM, HAIR, LEFT, RIGHT, BACK & FRONT instead of remembering the placement of flash groups A, B, C & D. Optical Slave with delay feature: The RF60 has a built-in optical sensor. The optical sensor captures pre-flash signals that are being emitted earlier than the flash sync. By setting the pre-flash optical trigger & the delay timer, you can set the exact time for the flash to start firing. This allows the RF60 to do not only first-curtain & second-curtain sync (also referred as front & rear curtain), but can fire at any given point of the image. High power up to Guide Number of 56 meters: The RF60 has powerful guild number GN56. The Fresnel lens was specifically designed to give out the best possible light. Compatible with Cactus V6 Wireless Flash Transceiver: Flash power output on RF60 Slave units can be controlled by an RF60 Master as well as Cactus V6 Flash Transceiver. Cactus V5 also supports basic flash triggering on the RF60 but does not support power output control on the RF60. Multi-flash feature: In Multi mode, a rapid series of flashes is fired to capture multiple images of a moving subject in a single frame. This feature is available in all three flash modes so its users can create the desired effects with both on & off camera flash. HSS Sympathy mode: The HSS Sympathy mode of the RF60 is designed to support flash photography at shutter speeds beyond a camera’s maximum sync speed. With the help of a TTL flash mounted on camera, RF60 fire flashes with an extended duration in order to produce even frame illumination at shutter speeds as high as 1/8000 second. The RF60 is meant for use in a multiple flashes setup & designed with the needs from the need of professional photographers in mind. Whether it’s a wedding or commercial shoot, timing is crucial. RF60 users will not only find adjustments quick & easy, the LCD also displays necessary information photographer needs to know. All in all, it offers an intuitive flash photography experience. So you, as the photographer, do not need to fiddle with the gear but instead enjoy the shooting experience.