The phottix strato 4 in 1 wireless trigger broaden your horizons ndash take your flash off the camera the 4 channel 24 ghz transmitter and receiver units boast ranges of 100 meters and beyond running on widely available aa batteries the small footprint transmitterreceiver system is a must for any kit bag unleash your creativity get your flash off the camera with the strato wire flash trigger you can take photos at sync speeds of up to 1250 and ranges of 100 meters and beyond use