RF cct LED controller SR-2830B is a full touch controller which offers fast and accurate color temperature adjustment and independent brightness dimming of each white. Designed with touch color line in the middle, the cct controller can adjust color temperature and brightness for natural white, warm white and cold white LEDs. Each controller can control 4 different zones separately or synchronously with endless receivers in each zone and 2 different kelvin or scenes can be saved for each zone. Independent smooth dimming of each white with 256 level brightness adjustment enables the LED controller to achieve millions of colors. Humanized memory function enables the controller remember the last Kelvin after turn off or cut off. While receivers are working with WiFi-RF converter, they can be controlled by WiFi via installing APP on IOS and Android systems.