Additional Information: A 90EX will be included as a bonus. I am a novice when it comes to cameras, so I cannot answer questions, but it seems this unit can be used as a commander for wireless multi-flash photography. <Important> I have confirmed that this unit flashes at the time of listing, but it has previously leaked battery acid, so it is considered a junk item (bonus). Please understand that returns or claims due to defects in this product will not be accepted. Please judge the condition from the photos. --- Thank you for viewing. As I no longer use it with my child's growth, I am selling it to someone who will use it. The following equipment works without any problems, but I am a novice when it comes to cameras, so please use it at your own risk regarding compatible models. Everything in the photos is included. (There is no instruction manual) I also plan to list a camera body (EOS 6D) and a lens (EF24-105mm F4L IS USM), so please take a look if you'd like. I have used and stored it with care. This product was purchased used and has been used a few times. There is a slight difference in surface gloss due to friction during case storage (photo 6), but other than that, there are no noticeable scratches, so I think it is in good condition. Please refrain from purchasing if you are looking for perfection. (This is a novice's inspection. I hope you can judge from the photos.) Thank you for your consideration.