With switches and Bridge installed, you'll need to download the Lutron app to your Android or iOS device. The app will walk you through the pairing process -- really, you'll just need to hold a button down on each switch when the app tells you to.
Lutron's switches are Apple HomeKit-enabled, which means you can also control them using Apple's "Home" app on your iOS device, or by using Control Center shortcuts on your iPhone. There's also an Apple Watch app you can download.
A two-switch Lutron Caseta In-Wall Wireless Dimming starter kit costs about $190, though you'll often find it marked down. Additional switches cost about $60 each. Read our full review to see whether or not we think they're worth saving up for.