Canon Speedlite 600EX-RT – Key Features: • Wireless Radio Transmission: Built-in 2.4GHz radio trigger system for reliable off-camera flash control (up to 5 groups / 15 units). • Guide Number: GN 60 (meters at ISO 100), perfect for long-distance flash coverage. • Zoom Range: 20–200mm (with wide panel down to 14mm). • Bounce/Swivel Head: Full 180° swivel left & right, tilt up to 90° – ideal for creative lighting angles. • High-Speed Sync (HSS): Works with fast shutter speeds for perfect daylight shots. • Weather Sealed: Durable and weather-resistant design, great for professional use. • Color Filter Holder & Gels: Included for color correction or creative lighting.