Wireless Transmitter. Large display, buttons, and function dial for easy operation. Various frequency channels for separating workgroups. Sleep mode and automatic shut-off. HS: Hi-Sync up to 1/8000 s (depending on the flash used). Range of up to 60 m in the studio and 200 m outdoors. Compatible with all products featuring EL-Skyport. The Nikon EL Skyport Plus HS Transmitter offers better quality, greater distance (up to 60 m in the studio / 200 m outdoors), and increased reliability. It also allows for faster shutter speeds of up to 1/8000 seconds for Nikon when connected to a TTL flash unit. However, the maximum shutter speed depends on the flash unit used and may vary by model. The transmitter features a large display, buttons, and a function dial for easy operation, as well as a USB port for firmware updates. Additionally, the transmitter is equipped with various frequency channels that enable the separation of workgroups.