Easiest way to switch device remotely with low power
Low power + wireless + easy, don't all typically go together at once.
I'm not aware of anything you can buy off the shelf turnkey, but if you wanted to remove the &quot;easy&quot; part of the equation there are a bunch of 2.4GHz wireless MCUs (Nordic, Silicon Labs, TI) that can be programmed to be low power.
Have the clock side sleep for 99% of the time and have the transmitting side repeatedly send the &quot;button was pressed&quot; packet until the RX side wakes up and replies with an acknowledgment.