The L-478DR-U-PX includes all the functionality of the L-478-series meters and adds radio-triggering for Phottix Indraand Mitros+ flashes and flashes connected to the Phottix Strato II receiver. The meter’s flash control screen allows selection of a single group or a combination of groups for flash brightness measurement. The F-number value for the light being measured appears in a central area on the screen as well as over the respective group selection button. The measured value for each group is maintained as a visual record of the brightness-difference of the lights in use so that lighting ratios can be easily determined. For more information about Phottix products see www.phottix.com.