This Skyport Speed Wireless Transmitter is redesigned to be more ergonomic and give better performance. The new case design helps eliminate accidentally turning the unit on and the LED indicator lights show if the unit is on, or needs recharging. Offering 4 workgroups with eight channels each helps eliminate interference and offers flexibility. Larger group sliders are easier to operate while a thumb wheel locks the unit securely to the top of your camera. Additionally the transmitter’s hot shoe adds an extra contact bar to help eliminate misfires. New design of the battery drawer ensures that the battery will always go in the correct direction. This unit offers a 20% increase in shooting distance from the original Skyport units. A high sync speed is capable with this offering speeds of up to 1/280. Auto shut off helps preserve power when not in use. Technical specifications: Shooting distance indoors 198ft, outdoors 474ft. approximate. This replaces the Elinchrom EL 19351.