Had me going for the wallet when Bluetooths was mentioned, as I love my DEROS (as well). Unfortunately it looks like it's just a way for your boss to keep track of how long you operate the sander, and can dock your pay if you're slack.
Being a great fan of the Festool Bluetooth batteries I was hoping other manufacturers wold embrace the concept (pattent pending). The cord turns the vac on, so in this case, the Bluetooth seems like a useless piece of tech, unless as a privateer, you want to hold your phone in your left hand to watch what your right hand is doing.
Cheap and woodwortking in the same sentenc is an oxymoron!