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Description: Set Time: Long Press "Down" key into setting time. Click "Up","Down" to select time, and Long Press "Down" key to finish. 12/24 hour module: Click "Up" key to change. Sleep module. Long Press "UP", while no display , into sleep module(22:00~07:00 no display. 07:00~22:00 display). Display all "0"number,out of sleep module. Set back color: Click "Down" to change color. when color refresh that means it is into change color automatic (every day change one color),or color is fixed. Material: Acrylic. Specification: Size: 114x46mm / 4.48x1.81inch Package Includes: 1 Piece Circuit Board 1 Piece Acrylic Enclosure Box 1 Piece Screw Kit