The new Nitecore D10 SP features an XP-E R2 LED and a new user interface (pre-set brightness levels, unlike the standard variable D10).
When the light is on, pressing and holding the tail button cycles through the three brigness settings: 130 lumens, 35 lumens and 2 lumens.
Hidden SOS and strobe functions are accessed by double clicking the tail button. The D10 SP also has a safety lock-out to prevent accidental activation.