• EL-5 Speedlight
• 30 m (98') Transmission Range
• 2405-2475 MHz Transmission Frequency
• Approx. 350-2450 Flashes (On Full Charge)
• 0.1-1.2 sec Recycle Time

• Type-A EOS Camera Compatibility
• 30 m (98') Range
• High-Speed Sync Sync Speed
• 110 g (4 oz) Weight
• 2x AA / LRG Batteries
• 10 hrs Battery Life
• LCD Display Facilitating radio controlled, two-way wireless transmission up to 98.4 feet, among up to five groups or fifteen individual Speedlites, the ST-E3-RT represents the next generation in wireless flash systems.

• Canon E-TTL / E-TTL II Compatibility
• 2.4 GHz Transmission
• 24-200mm (14mm with Panel) Zoom Range
• 0.1-1.2 Second Recycle Time
• 4 x AA Battery Power

Built-In Wireless Radio Receiver

• Up to 1/67,000 Sec. Flash Duration
• 0.01-5.5s Recycle Time
• Built-In Wireless Radio Receiver
• 85.3' at ISO 100 Guide Number Capture close-up images full of detail thanks to a powerful, precise & highly flexible twin flash system that recycles quickly and silently for the creative lighting of small subjects.