Flashpoint R2 TTL 2.4G Wireless Transmitter for Sony Cameras (X1T-S) Flashpoint R2 TTL Transmitter for Sony - Instruction Manual - Flashpoint 1-Year USA Warranty Flashpoint R2 2.4GHz Radio System unifies and simplifies Great transmission range beyond 330 ft / 100m Traditional Sony Flash Modes TTL / M / OFF High Speed Sync to 1/8000th