The Gemini 500r monolight retains the unique ability to be powered from AC mains in the studio or the award-winning Travelpak battery unit out on location as well as boasting a range of new features designed to offer photographers not only ultimate freedom but unmatched power, durability and control too.Take Control. Why should precise control be complicated? Simplicity is the key with Gemini. Digitally accurate control is easy without a confusing digital menu! Turn one dial for stops and the other for tenths to instantly set five stops of power with precision control, the LED display confirms the power output. Modelling control is also made simple with one switch, choose from full, proportional or off or even set the modelling lamp to any level you desire.Freedom is your choice These days unreliable sync cords are a distant memory for most photographers. Now you can also forget bulky radio receivers attached to your lights too! Thanks to the unique radio-card facility on the Gemini r. By simply plugging a radio trigger card into the slot on the back, Gemini lights instantly become compatible with either the Pulsar radio trigger system or the PocketWizard® system or Litelink - the choice is yours! Because the radio trigger card becomes an integral part of the unit it is much more reliable than an external receiver which can only be as good as it’s cord connection. Gemini monolights can also be controlled remotely with the Bowens RC3 IR remote handset which can adjust all basic features and advanced settings from up to 10m (32') away.