Yongnuo YN560 IV Speedlite Flash Supports Wireless Master Function<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"> *The 560 IV can be used as master unit， provides 3 independent groups with controlling ability， realizing remote control the flash mode， flash output and focal length of the YN560 IV and YN560 III. </span></li><li><span class="a-list-item"> *GN58 @ ISO100，105mm </span></li><li><span class="a-list-item"> *Sound Prompting System </span></li><li><span class="a-list-item"> *Support Electric Zooming Function </span></li><li><span class="a-list-item"> *Supports Wireless Slave Function， fully supports YN560-TX、RF-603（I/II）、RF-602 Wireless transmitter </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/511XDa3aE%2BL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41e9ZcP56HL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31CNAUE6X1L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/417I36PVvUL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51aXDHDx7NL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41j4nKm7u1L.jpg" noproxy>