Color change luminous square clock has 2 power supply modes: 3 pieces and 4 pieces batteries. The clock displays the time, date, day, and temperature. Where the temperature switches between degrees Celsius and degrees Fahrenheit. The LED lights have 7 color changes automatically and 8 alarm sounds to choose from. The clock has 4 sides to print the LOGO, and the printing area of one side is 3.15″*3.15″. The color can be customized if order quantity reaches more than 2000 pieces.