How do SRAM Double Tap shifters work and what makes them different from other types of shifters?

SRAM Double Tap shifters work by using a single lever to control both upshifts and downshifts. This is different from traditional shifters that have separate levers for each function. With Double Tap, a short push shifts to a harder gear, while a longer push shifts to an easier gear. This design allows for quicker and more precise shifting compared to other types of shifters.