Now available the Topre Realforce 104UW keyboard, in USA layout, is a joy to type on. It incorporates Topre's patented 30 million key life cycle non-contact electrostatic capacitance switches. The switch weight has been adjusted across the width of the keyboard depending on their relative positions and usage (55gm, 45gm & 30gm +- 15gm), to minimize fatigue for users, even after extended use, and are highly durable. The subtle black on beige/grey keycaps with their soft tactile feel and N Key Rollover ensure fast and accurate input.