Simple 4-digit DIY Digital LED Clock Kit White Desktop Electronic Mini-Clock 5-15 days with tracking. PCB Size: 5.5 * 2.7cm / 2.16 * 1.06in Package Size: 13 * 9 * 3cm / 5.12 * 3.54 * 1.18in Power Supply: USB Interface Display: 4-digit LED Adopts white PCB board which is the same size with nixie tube. Package List:E0776 1 * Electronic Clock DIY Kit