Pentel Thanks to the improved technology, Calme pens have a clearly muffled click noise and are not perceived as disturbing. The volume of click noise has been attenuated by 66% compared to other Pentel pens The click sounds of the forward buttons have also been reduced, which now glide much smoother and produce less vibration. The pens are multifunctional, making them perfect for everyday use. "CALME-3" in black and khaki is equipped with three writing colors: black, red and blue