The D-Lite RX 4 is one step up in the Elinchrom studio flash family, offering a robust case with ergonomic handle for harder working with larger accessories. The included 400Ws units are ideal for small business applications, portraiture and for everyone interested in the most creative lighting. These Swiss designed and tested units will not only give many years of reliable service and pleasure, but also make it extremely easy to upgrade your lighting as your interest and need grows. The Sky port remote control built into the Elinchrom units offers cordless triggering and control of power from the camera, and control of all functions from many other common devices. This set includes the latest EL-Sky port transmitter Plus. A strong and robust design which enables photographer to simply trigger and adjust flash power up to 200 m (656 feet) away, optimize reception by its swivel functionality and is powered by AA batteries.