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Sorry for my late answer. I'm not sure to understand what do you mean by "ASK or FSK"? May you please clarify?
For information, this new folding key is empty, i mean, you just need to take off your original electronic board and directly put in into this new folding key.
The only thing that you need to do is to engrave the key plate (with this seller, you can take a picture of your original key blade and based on this shared picture, he's able to engrave it, crazy but true, they can do it, it works)
Indeed, that's not an easy "plug and play". Thankfully i've been supported by ReyCZ95 (RCZ Fan Club France administrator) he's strongly skills regarding these technical questions. He had to change many things regarding electronics matters but my advice will be to ask your question directly with him, i wouldn't be sure to provide you best answers!