Supports: High-speed Sync TTL. High Guide Number: GN60@ISO100, 200mm. SUPPORT 1: USB Firmwar. Производитель: YONGNUO. Упаковка: Да. Размер модели: YN600EX-RT. SYSTEM: Supports RT System. Compatible with : YN-E3-RT Canon's 600EX-RT/ST-E3-RT Wireless Signal