Installation requires laser removal of some surface material under the powermeter. Removal of the power meter will expose that area and also destroy the unit; it is not transferable to another crank arm. Removal or any attempt at removal would void the warranty.
If you would like a powermeter on your new crank, it would involve a new purchase of a Factory Installed powermeter or you can purchase our Ride Ready option, which is a new Shimano crank with powermeter pre-installed.