I have been using wireless remotes purchased either at a Big Box or Amazon for many years. When shopping for the remotes, look for their current rating. I purchased only the ones that can handle 15A and I have never had an issue with either my 6.5 HP or 5 HP Dewalt vacs. The remotes have never failed.
I have however made a new change that I like even more - I am now using Amazon Alexa to control parts of my shop including the two vacs mentioned above. We use a Dot and an Echo in our home and use Alexa to control lights, ceiling fans etc. So I simply purchased a new Dot for my shop along with a couple of their "Smart" plugs (rated at 15A) and added them to Alexa's repertoire of devices. Now, I simply say "Alexa, turn on vacuum 1" and she carries out my command. Even with the loud vacuum going on she can hear me say "Alexa, shut off vacuum 1." She also keeps me company by playing my favorite tunes. And we use our Alexa system as a whole-house intercom system.