Fire compatible Speedlite flashguns over distances of up to 30m. Radio-frequency control provides reliable operation even when direct line of sight is not possible.BenefitsRadio frequency remote flash triggerWeather sealed against dust and moisture.Remote camera triggeringControls up to 15 flashgunsPart of the E-TTL II flash systemFire selected Speedlites from 30m awayFire compatible Speedlite flashguns over distances of up to 30m. Radio-frequency control provides reliable operation even when direct line of sight is not possible.BenefitsRadio frequency remote flash triggerWeather sealed against dust and moisture.Remote camera triggeringControls up to 15 flashgunsPart of the E-TTL II flash systemFire selected Speedlites from 30m away