Designed for Sony Alpha-series cameras, the Profoto Air Remote TTL-S lets you trigger your Profoto B1, B2, or D2 flashes remotely. It operates on a 2.4 GHz bandwidth and comes with eight frequency channels, each with three groups. Also, it functions over a range of 330 ft and 1,000 ft for triggering flashes in the TTL and normal modes, respectively. This remote features a High-Speed Sync (HSS) mode, which makes it possible to trigger flashes at a rapid shutter speed of 1/8,000th of a second. Use the LCD screen for viewing the various modes and settings in the remote. Also, the micro-USB port is useful for installing crucial firmware updates.