From Fender:
The sound of Fender’s flagship instruments. Fender Ultra Noiseless pickups are the pinnacle in stacked single-coil design, crafted with new winding techniques for livelier and more expansive tone. Alnico 5 magnets with polysol wire deliver a vintage voice with classic Telecaster sparkle without the 60-cycle hum.
Ultra Noiseless Telecaster pickups have the twang and bite that you expect from vintage Telecaster pickups, with no hum.