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.