Westcott continues to push the envelope with the introduction of the FJ400 400Ws Strobe with AC/DC Battery. The flash head recycles in just 0.9 seconds at full power - an impressive spec for a battery-powered light. Its 9-stop power range makes it readily adaptable to a variety of situations, as do High Speed Sync, Rear Curtain Sync, and TTL capability. Speaking of TTL, the FJ400 radio receiver is compatible with many Canon, Nikon, Sony (with adapter), Fujifilm, Panasonic Lumix, and Olympus cameras, as well as the Canon RT flash system. With separate purchase of the FJ-X2m Universal Wireless Trigger, you can make power and exposure compensation adjustments at distances up to 985'. The wireless system offers 16 channels with 6 groups to prevent interference with other photographers or to shoot several individual setups.