Product Details

The new flash trigger offers automatic exposure metering TTL without the need of a line of sight between camera and flashes.

Typically radio triggers offer a maximum range of up to 500m under best circumstances.
This allows the use of widely used AA batteries and comfortable buttons.
It supports TTL, manual flash mode, 15 channels and 3 groups, high speed sync (HSS) up to 1/8000s, automatic zoom, exposure compensation,PC sync and a lot more features.
Apparently the radio trigger offers a function called hyper-sync. This allows shorter sync speeds even with studio flashes or other manual flashes.

Features:

Compatible flash mode: E-TTL II/Manual/Multi Flash mode
Compatible Shutter sync: 1st curtain, 2nd curtain, High speed sync (HSS/FP) Max 1/8000s
Control remote speedlites using camera's build-in flash menu
PC port can output 1st/2nd/HSS signal to trigger studio flash
Flash Exposure Compensation (FEC)
Flash Exposure Bracketing (FEB)
Flash Exposure Lock (FEL)
Flash zooming (auto,manual)
Modeling Flash
E-TTL group ratio (ALL/A:B/A:B C)
Manual/Multi Group (ALL/A:B/A:B:C)
Live view triggering
High-speed continuous shooting trigger
Speedlites on hot-shoe of transmitter supports ETTL
Settings saved automatically
Single-contact camera & speedlite triggering

Compatibility:

This Canon EOS cameras offer in camera flash control with Yongnuo YN622C:
1D Mark III, 1D Mark IV, 1Ds Mark III
5D Mark II, 5D Mark III
7D
40D, 50D, 60D
450D, 500D, 550D, 600D, 650D
1000D, 1100D
The following flashes will support this wireless remote control through camera menu”:
Canon 600EX, 600EX-RT, 580EX II, 430EX II, 320EX, 270EX II