Hahnel HL -TUFFTTL Hahnel TUFF TTL Flash Trigger for Canon (Black)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Compatible with Canon E-TTL / E-TTL II2.4 GHz FrequencyRange: 656' </span></li><li><span class="a-list-item"> Digital Channel MatchingHigh Speed SyncWorks with Flash Exposure CompensationRemovable Silicone Casings </span></li><li><span class="a-list-item"> Mini-USB Port for Power &amp; UpdatesEach Unit Runs on 2 AA BatteriesReceiver has 1/4"-20 Thread on Base </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/518znSv-CUL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41a85SGVniL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41xhVClySlL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41XpAI9EUwL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41z1t4LzCmL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31EE8zCqPCL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41LjtH3MCnL.jpg" noproxy>