Thermaltake Riing Duo 12 RGB Radiator Fan has two individual addressable 16.8 million RGB colors LED rings with 18 patented LEDs in total and supports TT RGB PLUS software,Amazon Alexa Voice Service,and Razer Chroma software.The 120mm high-static pressure fan is PWM controlled and features long-life hydraulic bearing and compression fan blade design,delivering remarkable cooling performance without sacrificing quiet operation.Riing Duo is economical yet efficient and gorgeous! Featuring duo LED rings with 18 addressable LEDs,great light coverage,and uniform color and brightness,the built-in LED ring can paint your build with 16.8 million colors. The controller is designed with a DIP switch on the back.Hence,you can set a number for each controller easily.You can add up to 5 devices to one lighting controller and up to 16 controllers to the software. The controller and the coding guide are included in all packs.