DIY 4 Digit LED Electronic Clock Kit Large Screen Red Blue Green LED Feature: Name: 4 digit 1 inch LED digital clock kit PCB Dimension: 98 x 35 x 1.6 mm (L x W x H) Case dimension: 105 x 46 x 29 mm (L x H x D) Digit dimension: 1 inch Working voltage: DC 5V Case material: crystal case Circuit: welding assembly Color: Red LED / Red LED with case / Blue LED / Blue LED with case / Green LED / Green LED with case SCM process : You have written a program can be used directly . Can charging with your