After you've powered up your Easy Touch Speaker by plugging it in, it'll immediately recognize any Smartphone that's been turned on and placed face up on its platform. Once this recognition occurs, the platform's magnetic field will capture any sound waves that are coming out of the Smartphone and amplify them.
That means you'll hear them at a higher volume than you would while using the phone alone. At the same time, the platform will be continuously charging the Smartphone as it rests on top of it, so you won't run out of power as you use it for your chosen activities.