A:AnswerThe Kit doesn’t come in a cardboard box, but there is a outside cardboard feature display labeled sealed wrapped around the box that should be sealed. This will let you know the item has not been tampered with. I hope this helps.
A:AnswerYou'll want to buy a Paul C Buff Vagabond.
https://www.paulcbuff.com/Portable-Power/Vagabond-Mini-Lithium.html
This will work well for all monolights and power and usb devices you purchase from best buy.
A:AnswerCannon 40D has a hot shoe. i do not see any reason why it should not work with this product. but i did not check the distance of the transmitter range.