The I700n do not actually come with any built in radio function (keeping the price low), though with the addition of a clip on external radio receiver, their function is then transformed into a Canon RT compatible radio slave flash.
This provides a very economical flash option for the many current YongNuo YN-622C TTL radio trigger owners, while still leaving the option open for upgrading or transitioning to the more recent Canon RT radio system later.
YongNuo have their own YN600EX-RT flash available now (and ICON have a similar model coming very soon too). Though the YN600EX-RT are priced closer to $180, where as the I700 care from around just $120.
And Shanny also have even lower priced (from around $90), full HSS, TTL, and YN-622C compatible flash model variations coming as well ( I700c & I700n).
Of course these are all great options for the many people just after an on-camera HSS TTL flash as well, and at less than a quarter of the Canon 600EX-RT price.
If the I700n flashes are any indication though, its clear that ICON are very capable. And YongNuo now have some serious competition on their hands, on all fronts, and before the YN600EX-RT are even available.
I700C FEATURES
Full Power â€œ GN 62m (ISO 100 / 200mm)
HSS to 1/8000th
Flash Mode â€œ ETTL /M / Multi
1st Curtain Sync / 2nd Curtain Sync
FEC / FEB â€œ 1/3rd Increments (Â±3 stops)
Manual Flash â€œ 1/128 â€œ 1/1 output control (1/3rd increments)
20-200mm Auto and Manual Flash Zoom
Canon RT / Shanny Radio Slave Mode (with clip on SN-E3-MD receiver)
Master and Slave Modes for Canon Optic Wireless system
Slave Mode for Nikon Optic Wireless system
S1 & S2 Basic Optic Slave Modes
Full power recycle â€œ from 1.8 seconds
Supports Multiple Flash Groups
Radio Channels â€œ 4 to 16
Optic Channels â€œ 4
Supports Canon Flash Control Menus
Custom Functions
Sound Prompt
Heat Protection
LCD Back Light Can be Kept On
Crop Sensor Auto Zoom Option
AF Assist Light
Full 360 Degree Swivel and Tilt Head (With Tilt Lock Button)
Large Clear Dot Matrix LCD Screen
Canon Like Interface
Fast Clamping Metal Foot with Locking Pin (And Clamps Well)
Good Build Quality
External Battery Port
PC Sync Port
2.5mm Communication Port (for radio receiver)
No USB Port, Though Firmware Updates May be Possible Through Radio Receiver USB Port.
Limitations
No RT Radio Master Mode Possible
RT Radio Slave Mode Requires an External Receiver Unit
AF Assist Light is Good, But Not Great
No Compatibility with Phottix Odin or Pixel King Pro (YN-622C work well)
See more at: http://flashhavoc.com/shanny-sn600sc-speedlite-review/#sthash.BuaBifDS.dpuf

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