How to use

I use the: ‎Apple TV Remote on the App Store

"Requirements:

• iOS devices using iOS 9.3.2 or later

• Wi-Fi connection to Apple TV

• Apple TV (4th generation), using tvOS 9.2.1 or later

• Apple TV (3rd generation), using Apple TV Software 7.2.1

• Apple TV (2nd generation), using Apple TV Software 6.2.1

• Certain Now Playing features, including lyrics, playlists, and chapter, audio, and captions selection for movies and TV shows, require iOS 10.3 or later and tvOS 10.2 or later

• Volume control requires an AV receiver with CEC support"

You can buy a replacement Apple Remote (aluminum) from Apple or other resellers.

Apple Remote (aluminum) - Apple TV Accessories - Apple Store Online