Specifications:
- Compatible Cameras: Canon EOS cameras (E-TTL II auto flash).
- Guide Number (1/1 power @ 200mm): 60 (m ISO 100) / 190 (feet ISO 100).
- Flash Coverage: 20 to 200mm (14mm with wide panel).
- Auto zoom (Flash coverage set automatically to match the lens focal length and image size) and Manual zoom.
- Swinging/tilting flash head (bounce flash): 0 to 360° horizontally and -7° to 90° vertically.
- Flash Duration: 1/300 to 1/20000 second.
- Flash Control System: E-TTLII auto flash and manual flash.
- Wireless Flash Function: Master, Slave, Off.
- Controllable slave groups: 3 (A, B, and C).
- Transmission Range (approx.): Indoors: 12 to 15m (39.4' to 49.2') Outdoors: 8 to 10m (26.2' to 32.8').
- Channels: Optical: 4 (1, 2, 3 and 4); 2.4G: 32 (1-32).
- Slave-ready Indicator: Two red indicators blink.
- Modeling Flash: Fired with camera's depth-of-field preview button.
- ColorTemperature: 5600±200k.
- Size: 64 x 76 x 190 mm.