Powerful Flash with GN 197'/ 60m @ISO 100 (200mm) Uses the universally available and inexpensive AA 1.5V battery Travel without concern of Lithium challenges from TSA Full power recycle time of fewer than 2.6 seconds Approximately 330 full-power flashes on a set of AA's Remote Panasonic and Olympus TTL power control with the Flashpoint R2 system built-in Complete camera compatibility with TTL system features like exposure compensation, EXIF inscription, flash value lock, and High Speed Sync [HSS] R2 TTL communication flashes as a Transmitter or Receiver Auto-Sensing Canon / Nikon / Sony / Panasonic / Olympus / Fuji / Pentax TTL Radio Receiver Modes Zooming 20-200mm head with automatic or manual control for even distribution of the flash Quick Manual to TTL and back button featuring TCM Transmit Mode control of 4 different wireless Groups Receiver Mode operates on 5 Groups Backlit Matrix LCD for constant visual confidence