With its strong output and extended connectivity options, the Canon Speedlite EL-10 is suitable for mirrorless photographers eager to enter the broader world of flash photography. When mounted on compatible EOS R series camera bodies, the light can control up to 15 additional Speedlite units, opening the door to a brighter spectrum of creative possibility. Maximum guide number of 131' at ISO 100 and 200mm. Runs on AA batteries, available separately Up to 210 full-power flashes on a single charge. Able to continuously trigger up to 55 flashes in a row. Manual power from 1/1 to 1/1024. 2.4 GHZ wireless radio transmission as sender or receiver for wireless triggering and control of up to 15 flash units from up to 98’ away. Stand the flash head straight up at 90º, swivel it to the left 150º and 180º to the right, or deploy the retractable diffuser to soften the light output. Multi-function shoe enables direct control of settings from compatible cameras. Create up to three user-set custom profiles for quick switching in environments with varied ambient light. Control settings with your smartphone using the Canon Camera Connect app. Compatibility: The Speedlite EL-10 features the Multi-Function Shoe and requires a compatible camera. This includes: EOS R3, EOS R6 Mark II, EOS R7, EOS R8, EOS R10 and EOS R50.