Kaba Mas X0 Series X-10/CDX-10/ DKX-10/DKXL-10. Poorly lit areas make it difficult to see a lock’s visual control, and temporary lighting is a potential security issue. The X-10 now has the solution – simply turn the dial and the X-10 LCD screen illuminates. The X-10 was originally designed with the backlit feature in mind. Approved by the GSA after its first test submittal, the backlit feature is standard on all X-10s. Buy with confidence – all X-10 locks come with a two year warranty!