I need to press and hold down the POWER key for my device to switch on. How can I include this is in a Macro?

Our remote controls always send out the standard duration of a signal, which enables most Macros. In your case, you need to keep the key pressed for a few seconds, which we are unable to reproduce into our Macros. Unfortunately, there is no solution for this. Our apologies for any inconvenience this may cause.