For camera remote control or for triggering speedlights and studio flashes. Auto-Sensing: switches automatically between modes camera remote/flash trigger. Compatible with many (D)SLRs and mirrorless CSCs. 7 channels can be selected, indicated by LEDs. 2.4 GHz radio frequency. Sync speed up to 1/320 second. For shutter release a suitable cord is required (available as an accessory). Box contents: receiver 2.5 mm to 3.5 mm flash sync cable, 3.5 mm to 6.35 mm plug adapter. Batteries: 2 x AAA (not included).