The elinchrom skyport wifi module allows you to control your rx heads using an iphone ipad or ipod touch when used in conjunction with the free elinchrom el skyport mobile phone application from the apple app store powered by an internal li ion battery with a maximum operating time of 10 hours from fully charged the module has 8 channels across 4 workgroups and can work at distances of up to 20m indoors or 50m outdoors wifi function and 40m indoors and 100mm outdoors skyport function