Cowboystudio UNPT-04， 4 Channel Wireless Hot Shoe Flash Trigger and Receiver Set with Umbrella Holder for Canon EOS， Nikon， Olympus &amp; Pentax Flashes<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"> One (1) Transmitter (with 23A 12V battery installed) </span></li><li><span class="a-list-item"> One (1) Receiver </span></li><li><span class="a-list-item"> Special Umbrella Holder Mounted Directly on the Receiver </span></li><li><span class="a-list-item"> Trigger life up to 50，000 times with 0.01mA Current </span></li><li><span class="a-list-item"> More Stable， No Misfiring Problem </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41%2B9Z7kEOXL.jpg" noproxy>