Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What is the country this transmitter manufactured in?
Document: This transmitter is alot nicer than the ST-E2 transmitter version but it did not work with my flash so i had to return it.
The transmitter does what I need it to do. It fires my flash when not attached to my camera. Delivery was prompt. I like it.
I tested the transmitter and found that it is quite nice. It can drive many speedlights, but I have only one for testing.
this is a good speeditle transmitter and you can setting the flash data on that. it is easy to connect to my cannon 600 flash. i like it very much
This unit came out at the time I am tried of third party radio transmitter such as Pocket Wizard and Pixel King.
The transmitter works perfectly in syncing the flash to the camera. This device gives you the same control over the flash as if it was attached to the camera directly.
This device Canon ST-E3-RT Speedlite Transmitter should have every photographer using flash Canon EX-600 RTI already like to use it.
But now that I have this transmitter and the flashes have the receivers built in I don't see using them much anymore.The outrageous price is the only reason for the 3 star rating, but as far as usability its a 5.
Works as it should.My only complaint that it does not work with the 580EX II flashes. Other than that, It works as it should. Being able to adjust the flashes from the transmitter is a time saver.I will still have to keep my pocket wizards for triggering my cameras and other flashes, but for
I have 3 600-RTs and the ST-E3-RT means I can use all 3 off camera and control all the features on each flash remotely from either the transmitter or from the in camera menus no more climbing up to or lowering flash units to make adjustments I love it.
Answer: It's manufactured by Canon in Japan.