900 MHz FM transmitter

I bought a couple of wireless speakers that work through receiving 900 MHz, but the transmitter is missing so I would like to build a transmitter. But, I don't really know where to start. Will anyone give me some guidance? Treat me like the amateur that I am.

What are the speakers? Part number? Maker?

You should download the service manual then copy the transmitter. Its frequency is extremely high, almost microwave, so of course your construction probably will not work.

I dont mean to be a killjoy, however a 900mc transmitter isnt really a noob project, unless you find some precise instructions, and it would no doubt cost more than a new pair of speakers.