Our CAME-TV Astral Wireless Follow Focus system allows you to wirelessly control the focus, iris, or zoom for most DSLR mirrorless or cine-style lenses. The Astral can connect to each other from 1,640’ away using a 2.4 GHz wireless signal. The controller features a built-in marking disk and an OLED display that provides battery level, connection, calibration, travel and memory information!