The CamFi is a wireless controller for Canon and Nikon DSLRs which creates its own wi-fi hotspot to connect to a free downloadable app which is compatible with iPhone and iPad and Android mobiles, or Windows and Mac computers. It allows comprehensive camera function control, including ISO, exposure, and focusing, and provides multiple timing options. You can also stream live view output to the device. The working distance is up to 50m, and the CamFi's neat lightweight enclosure means that it's easy to take with you at any time.