So I just got a Pro Master 5750DX Flash unit because a local store was going out of biz and I was able to get it cheap. I thought (and so did the folks at the shop I got it at) the infrared sensor would just have a setting, but I'm not seeing anything. Does anybody know how to get the flash to work remotely? Is there a setting I'm missing on the flash unit? Is there a setting in the camera? Do I need an additional remote trigger? (using with my Olympus OM-D EM5 fyi) All help ASAP would be greatly appreciated. Thanks!