RoboSHOOT RX-15 Receiver For Fujifilm X-Series Cameras, Supports X-Series Speedlights, Runs on AAA Batteries, 60 to 120' Range, 2.4 GHz Frequency, 4 Groups, Flash Exposure Lock, Flash Group Profiles, Flash Sync Up to 1/180 Sec LIGHTING-Triggers & Remotes