The GMAX-EOS2 is a Solmeta GPS device, it works for Canon cameras. Function - Search and connect GMAX or GMAX-EOS2 device by bluetooth wireless. - Focus the camera lens and holding it. - Release the camera shutter. - 3 lights to indicate the command returning status of GMAX or GMAX-EOS2. For more details, please visit http://www.solmeta.com Copyright © 2015-2020 Solmeta Corporation. All rights reserved.