The Hahnel Tuff TTL Additional Receiver for Nikon lets you expand your wireless flash setup by adding extra off-camera flash guns to an existing Tuff TTL system. Simply mount this receiver onto any compatible Nikon i-TTL flash and it will respond to the Tuff TTL Trigger mounted on your camera, giving you full TTL and manual flash control with no additional triggers required. The receiver communicates via a 2.4 GHz radio signal with a range of up to 200 metres, and uses Digital Channel Matching to pair reliably with your transmitter while avoiding interference from other units on set. A removable silicone casing protects the unit from bumps and knocks, while a standard 1/4"-20 threaded mount on the base allows secure placement on a light stand or accessory mount. A Mini-USB port provides options for external power and firmware updates, and the unit runs on two AA batteries for affordable, everyday use. High Speed Sync, second-curtain sync, and flash exposure compensation are all supported.