The Wireless Flash Transceiver V6 from Cactus will wirelessly trigger your Nikon, Canon, Pentax, Panasonic, Olympus and 15 other models from 328 to 886' away, depending on conditions. In fact, many of the flashes that are not on the compatibility list (see features) can be used via the V6's Learning Mode. The V6's TTL Pass-Through technology allows you to mount both the V6 and your flash with its TTL connection intact while you remotely regulate power and trigger your slave flashes. In keeping with the V6's status as a transceiver, it has both a mounting foot and a hot shoe allowing it to be used on camera or as a slave with an untethered flash. The V6 runs on 2 AA batteries, or optional USB or DC power sources.