This is a great kit that incorporates all of the essentials you need in a quality strobe system. Included in the kit is (1) Digital 1200RX Power Pack (1) A 3000N / Speed Head (1) Style 600RX (1) EL-Skyport RX Trigger set with 1 Transmitter and 2 Transceivers. The power pack contained in the kit is a 1200 RX. Power, control, versatility, reliability, and consistency is what makes up the new Digital 1200RX Power Pack. With output control in truly-accurate 1/10th stop increments and the ability to interface with Mac or PC systems, this new power pack from Elinchrom outperforms the competition. The new Elinchrom Digital 1200RX compliments today’s digital systems. The Skyport transmitter is one of the smallest triggers on the market allowing it to sit 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 and is designed to send and receive signals from the Skyport Transmitter and Skyport USB RX Transceiver. 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. The A3000N features a small flashtube diameter for short flash duration and better subject control.