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<blockquote data-quote="WayneF" data-source="post: 315711" data-attributes="member: 12496">There are different styles, but in this case, the square thingie is the transmitter for the camera hot shoe (the TX implies transmitter).&nbsp; The longer thingies are the receivers for the flash foot.&nbsp;&nbsp; In other cases, both receiver and transmitter are the longer shape.There is vast amounts of detailed description available on the web.&nbsp; Search Google for specific modelsRF-600TX RF-603 ReviewetcThere are vast amounts of opinions and descriptions to read.&nbsp; Try just a little harder.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />Such radio triggers can do remote triggering, but it will be manual flash mode.&nbsp; Automatic point&amp;shoot TTL flash mode will not be possible.The Yongnuo RF-603 III flash unit (a manual flash unit) has a compatible radio receiver built into it.&nbsp; The II model does not , and will need the separate receiver.</blockquote>

[QUOTE="WayneF, post: 315711, member: 12496"] There are different styles, but in this case, the square thingie is the transmitter for the camera hot shoe (the TX implies transmitter). The longer thingies are the receivers for the flash foot. In other cases, both receiver and transmitter are the longer shape. There is vast amounts of detailed description available on the web. Search Google for specific models RF-600TX RF-603 Review etc There are vast amounts of opinions and descriptions to read. Try just a little harder. :) Such radio triggers can do remote triggering, but it will be manual flash mode. Automatic point&shoot TTL flash mode will not be possible. The Yongnuo RF-603 III flash unit (a manual flash unit) has a compatible radio receiver built into it. The II model does not , and will need the separate receiver. [/QUOTE]

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