Compatible flash mode: ETTL (II) / Manual / Multi.
Compatible shutter sync: 1st curtain, 2nd curtain, high speed sync(HSS/FP), Max 1/8000s sync speed.
Control remote flash using camera's flash control menu screen (Remote control mode).
Support E-TTL / Manual / Multi flash mode mix using (Mix control mode).
Flash on hot-shoe of transmitter supports ETTL.
Support Flash Exposure Compensation (FEC).
Support Flash Exposure Bracketing (FEB).
Support Flash Exposure Lock (FEL).
Support modeling Flash.
Support E-TTL group ratio (ALL/A:B/A:B:C).
Support Manual/Multi group (ALL/A:B/A:B:C).
Support flash zooming (auto, manual).
Support PC port triggering strobe flashes.
Support 1st, 2nd curtain/HSS (super sync).
Support LCD live view triggering.
Support high-speed continuous shooting trigger and its settings saved automatically.
Compatible with All Canon EXII series flashes.
Support single-contact of camera & flash triggering (max sync speed is 1/250s).
External flash menu control functions of EOS SLR cameras: for Canon EOS 5D Mark II/5DMark III/1Ds Mark III/1D Mark IV/1D Mark III/7D/60D/50D/650D/600D/550D/500D/450D/1100D/1000D/EOS M
Does not have external flash menu control functions of EOS SLR cameras: EOS 5D, 10D, 20D, 30D, 300D, 350D, 1D, 1D Mark II
Other standard hot shoe brand of camera (Supported by the camera menu wireless remote control): for Canon 600EX(RT)/580EXII/430EXII/320EX/270EXII
System type: On-camera wireless transceiver
Frequency: 2405-2475 MHz
Distance: Approx. 80m
Channel: 7 Channels
Flash mode: E-TTL (II), Manual flash, Multi flash
Sync mode: 1st Curtain, 2nd curtain, Hi-speed sync
Groups: 3 Groups (A/B/C)
Sync Speed: 1/8000sc
Input: Hot-shoe (TTL, main contact)
Output: Hot-shoe,3.5mm Flash/PC sync jack (300v no polarity)
Applicable battery: 2 * AAA (batteries are not included; and it supports 1.2V rechargeable batteries)
Stand-by time: 40h
Trigger size: 7.2 * 5.5 * 3.65cm / 2.8 * 2.2 * 1.4in
Triggers' total weight: 104g / 3.7oz
Package size: 15.5 * 14.5 * 6.8cm / 6.1 * 5.7 * 2.7in
Package weight: 250g / 8.8oz
Here's one review of TL680C from a forum for your reference:
The TL680C uses the normal 2.4GHz frequency and allows for the use of 7 channels. Their 80 metre range makes them more than adequate for normal use, unless you're into super-telephoto photography. I tested this as well, using new batteries, a lot of space and a slightly disinterested girlfriend and found these figures to be a pretty accurate representation. If anything, they exceeded their 80 metre range. Despite continuous use throughout my test, I found the TL680C to be pretty good in terms of reliability, and they weren't too quick to guzzle up juice from the two AAA batteries inside. TL680C is estimated their standby time to be around 40 hours. When I was first given these triggers, I was particularly interested in how they'd fare at high shutter speeds, so I tried some shots in direct sunlight. After all, it promises that their TL680C can manage HSS all the way up to 1/8000s. Using both "M" and "ETTL II" modes with a Canon 600 EX-RT and an EOS 5D MK III, not once in my test did the trigger misfire.
2 * Transceivers
1 * Flash cable
1 * 3.5-6.35mm convertor
1 * Bag
1 * User manual
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