Razer Sabertooth Xbox 360 controller ups the ante on tourney gaming, we go hands-on | Engadget
Razer is making a $150 Xbox One controller for e-sports gamers : r/xboxone
Amazon.com: Razer Raiju Tournament Edition Without the1.04 Firmware Gaming Controller Bluetooth & Wired Connection (PS4 PC USB Controller with Four Programmable Buttons, Ergonomics Optimized for Esports) : Video Games
Razer Onza (Tournament Edition) - Bjorn3D.com
Razer Onza Tournament Edition Xbox 360 Gaming Controller Review
Razer refreshes Onza 360 controller with new Tournament and Standard Editions | Engadget