This is a one-owner product purchased new several years ago. I used it two or three times a year after purchase, but I haven't had a chance to use it since the pandemic, so I'm putting it up for sale. I estimate it has been flashed about 300 times. I re-tested its operation before listing it. It can be synchronized with a camera's strobe and flash. Also, if you attach the transmitter, which is included in the set, to the accessory shoe of a camera with a contact point, and attach the receiver to one monolight strobe, the other strobe will flash in synchronization. You can take portraits with very beautiful colors (in my personal opinion). I think it's perfect for beginners to practice with. #Monolight #MonolightStrobe #Strobe #Portrait #Camera