PocketWizard Plus IV Transceivers (Black Set Of 2) With Accessory Pack + Cleaning Cloth Limited 3-Year Warranty 32 Channels and Quad-Zone Triggering: Activate or deactivate up to four zones of remote flashes or cameras On Camera TTL Flash / Remote Manual Flash: On-camera TTL compatibility with most Nikon, Canon, Panasonic, Fuji and Olympus cameras and flashes Combination Transmitter and Receiver Includes AA 4 Pack Batteries, Include 5 Piece Cleaning Kit & Cleaning Cloth