Lighting control is simple with these touch-sensitive LED lamps. Touch the red pad for red light (blue pad for blue light model), the white pad for white light. Hold your finger on the pad for more than two seconds and the lamp will cycle through four dimming levels. Release your finger on the light level required. Can also be remotely operated from multiple points with any off-the-shelf momentary ON/OFF/ON switches. Light levels are "remembered" by lamp circuitry even after vessel's batteries have been turned off. Completely waterproof, impact and shock resistant.