This system comes with a transmitter and receiver and is the perfect choice for studio and location work alike. The 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. The Skyport Universal Speed Receiver is compatible with Elinchrom and any other studio and battery flash brands. The new ergonomic design and larger sliders make this unit easy to set and use. Skyport Universal Receiver’s internal, rechargeable Li-Ion battery provides approximately 30 hours of operation. To maximize battery life, the Auto-Standby function activates if the unit is not used. Technical specifications: Shooting distance indoors 198ft, outdoors 474ft. approximate. This replaces the Elinchrom EL 19360.