RiotPWR ESL Game Controller | Keeps you wired and connected [Review] – G Style Magazine
ESL eSports gives Xbox One some gaming tournament cred with new app | PCWorld
Introducing the ESL Xbox One app! - ESL
ESL working with Microsoft to integrate eSports tournament system into Xbox Live | VG247
Amazon.com: RiotPWR ESL Gaming Controller for iOS iPhone & Carry Case – Wired Gamepad with Triggers, Power Pass Through Charging, D-Pad & Headphone Socket - Handheld Game Console Accessory : Video Games
ESL Xbox One Invitational Qualifier 1 - SMITE Esports Wiki