Refer: https://support.logi.com/hc/en-ca/articles/17177604450711-FAQ-Wave-Keys-MK670-Combo
Refer: https://www.amazon.com/gp/product/B0BTNXW6W2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
My NumPad/KeyPad is not working with Wave Keys keyboard, what should I do?
Make sure that the NumLock key is enabled. If pressing the key once doesn’t enable NumLock, press and hold the key for five seconds.
