Multi-Function Quick Dial and 12 Customized Express keys The quick dial is specially designed for VEIKK A15Pro drawing tablet. It has default functionS for zooming canvas/adjusting brush/scrolling page. You can program the quick dial and all the 12 express keys to functions that you need. Thus, they greatly simplify your workflow, and you would not have to have a keyboard close. Intelligent Passive PenThe battery-free pen features 8192 levels of pressure sensitivity and 250 PPS report rate, so you can draw lines of different thicknesses according to your needs without any delay.The Passive pen supports ±60°tilt function after FIRMWARE UPDATED, helping you add shadow to your art creation.