For Canon 

• Support Canon E-TTL.
• Up to 3 difference group and 7 combination on the flash transceiver.
• Support EOS E-TTL II.
• When using the EOS EX II series flash, you can set difference setting on difference group, available to set 1/1~1/128 flash output, totally 23 difference levels.
• When using EOS EX II series flash, you can adjust the flash exposure compensation from camera.
• Support all the shutter speed, sync speed up to 1/8000s;using the PC socket control the studio ight which also support 1/8000s sync speed.
• Multi control the speedlite or studio light.

Function

• Support flash power in camera menu
• Support flash control in camera menu
• Support EV
• Support FE lock
• Support camera group setting
• Support 3 flashes output as different power
• Support flash group setting on transmitter
• Support 1st Curtain, 2nd Curtain and High speed sync
• Support High speed sync for studio and outdoor light
• Support well known brand flashes for High speed sync and TTL. (Metz, Sigma, Sunpak, Nissin)
• Support well known brand flashes for trigger. (Does not support high speed sync and TTL flash)
• Support firmware upgrade
• Support multi receiver control
• Support flash focusing light
• When King is used with EOS EXII flash, flash power can be adjusted in camera menu.
• Follow camera instructions for above usage.
• Do not support flashes using mixed modes, such as E-TTL and M together
• No support for strobe mode
• No support for Canon wireless flash system
• No support for bracket exposure
• No support for directly controlling flash mode and power for EX series flash as camera menu
• Receiver does not support camera shutter and flash trigger at the same time.
• Transmitters hot shoe is NOT used for flashgun

Compatibility

Compatible with Canon EOS flash:

Canon EOS 580EXII,580EX,430EXII,430EX,320EX,270EXII,220EXII Flash