YONGNUO RF-603C-II-C3 Wireless Remote Flash Trigger Kit for Canon 1D 5D 7D 10D 20D 30D 40D 50D<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"> Adding the locking rings </span></li><li><span class="a-list-item"> Max sync speed: 1/320 second </span></li><li><span class="a-list-item"> 3.100m transmission distance with 16 channels </span></li><li><span class="a-list-item"> Type: FSK 2.4GHz wireless remote control system </span></li><li><span class="a-list-item"> Shutter release: half-press， full-press， takes 7 - 15 days to deliver </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41LM59n7ZqL.jpg" noproxy>