The Profoto TTL-F Air Remote is used for triggering electronic flash units from a distance of 300 m. You can use the remote for controlling Profoto B1, B2, or D2 series strobes via your Fujifilm TTL camera. When you use the AirTTL flash heads with the remote, it makes the strobe fire a flash automatically to determine the ideal setting. You can also use the TTL flash with an AirTTL flash to get a hybrid operation where the system switches to manual after the TTL flash captures the first exposure. This remote offers a maximum sync speed of 1/250th and 1/1000th of a second for regular and HSS flash units respectively. The 2.4GHz radio system provides a working range of 100 m with TTL and HSS flash units. You can attach the TTL-F Air to your camera with its hot shoe contact. You can update the firmware via the mini-USB port. The remote can work for 30 hours continuously with the two AAA batteries.