Nissin Air R Receiver, Wireless 2.4GHz Nissin Air System Receiver for Canon - Includes Nissin USA 2 Year Warranty METAL COLDSHOE AND TRIPOD SOCKET: The Air R Receiver has a durable metal coldshoe with a lock ring to provide an easy attachment to off-camera mounts. The 1/4 inch tripod socket provides further flexibility for on-location shooting. 3 SLAVE MODES: Air R receiver can be set to Group A, B or C and controlled wirelessly in TTL and manual modes. Using the 3 slave modes, multiple flashes can be set up to enjoy creative photography in any situation. HIGH SPEED SYNCHRONIZATION: The receivers high-speed synchronization provides up to 1/8000 second shutter speeds, continuous shooting speed up to 10 shots/second and will last for approximately 5,000 flashes. WIRELESS FLASH SHOOTING: The Nissin Digital Air R Wireless Radio Receiver attaches to your flash and accepts flash trigger signals from the Air 1 Commander (sold separately). Control one flash or many flashes up to 98 feet away, this is the perfect addition for wireless flash shooting either in a studio or on location. The Air R Receiver can be combined with original flash models as well as all other Nissin non-NAS compatible flashes to provide a near limitless variety of lighting possibilities. NISSIN AIR SYSTEM TRANSMISSION: The Nissin Air System, NAS, is Nissins newly developed 2.4 GHz radio transmission wireless flash system. Compared with the traditional optical wireless transmitters, 2.4 GHz radio transmission is less susceptible to angle and obstacle limitations. Equipped with Nissins ID technology, the IDs give each of the NAS compatible devices a unique identity and can be set to prevent misfiring in the event of signal interference.