Flashpoint R2 i-TTL 2.4G Wireless Transmitter for Nikon Cameras (X1T-N) Flashpoint R2 iTTL Transmitter for Nikon - Instruction Manual - (AA Batteries Not Included) - Flashpoint 1-Year USA Warranty Flashpoint R2 2.4GHz Radio System unifies and simplifies Great transmission range beyond 330 ft / 100m Traditional Nikon Flash Modes iTTL / M / OFF High Speed Sync to 1/8000th