RGB Controller, 3 Channel. 4 Amps per channel cmos. 5 to 28 Volts DC. Common Anode. WIFI. Common Anode means that you have 1 plus volts line that is common. You will have three channels that can pull the channel low so it lights. Uses WIFI for easy installation and control. The size of the controller is 2.008"x .944" by .433" Very small profile. Easy to install software just take a picture of the QC image on the controller.