This is a great kit that incorporates all of the essentials you need in a quality strobe system. This kit comes with a Digital 2400RX power pack, (1) A 3000N / Speed Head (1) Style 600RX Head (1) EL-Skyport RX Trigger set including 1 Transmitter and 2 transceivers. The new Elinchrom Digital 2400RX Power Pack compliments today’s digital systems and breaks the price barrier with its state-of-the-art, lightweight, and compact design. This pack features: Ultra stable circuitry for absolutely consistent output power. Unique, dedicated, and economical Digital SE flashhead for QTVR and 4-shot durability and stability as well as single–shot use. Precise digital power display to complement advanced technology. Modeling lamps can be proportional or independent, with display. Fast recycling consistent with precision and stability. Surge resistant circuits, Auto Dump Function, twin synchro sockets, ready beep, sensitive photo – cell, anti shock edgings, fan cooled. The Skyport is one of the smallest triggers on the market and sits securely in the hotshoe of your camera, The Skyport Trigger can also control the power in 1/10 of a stop increments and turn the modeling lights on and off of all Elinchrom RX flash units that have a Skyport RX Receiver attached. To control all RX functions the Skyport USB Transceiver and the latest EL Skyport software is required. The EL Skyport RX Receiver works only with any Elinchrom Style RX monoblocs, Ranger RX Batteries or Digital RX Power Packs. Skyport RX Receivers require no batteries as they get their power from the device they are plugged into. The A3000N is designed to perfectly complement our power packs and light modifiers to provide the cleanest, most-efficient light output.