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 & Gemini Pro monolights. 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. 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. Simply insert the Radio Trigger Card into the slot on the back of the Gemini unit & fit the antenna into the socket on the side & your monolight can now receive signals from a Pulsar Radio Trigger unit mounted onto your camera. Never be let down by unreliable sync cords or connections again. 1 of Pulsar Radio Trigger Card 1 of Antenna for Gemini unit.