BigTime DIY watch is a kind of fashion style acryliccaseor NATO digital watch. Watch the use of ATmega328 as a processor 32KHZ as the crystal oscillator clock source. To view the clock is just press the button next to the watch, the digital tube will show time. When you need to adjust the clock, the first light to see the clock, and then a long button to enter the clock adjustment mode. Since our watch is ultra - low - power, so a CR2032 - button battery can run for about two years.. And our watches are programmable, with our FTDI module can be programmed to download. Programming download Pro or 3.3V/8MHz Mini Pro w/ ATmega328 Arduino board model can be.