Monoprice  22 inch 1080p Battery Free Pen Display Tablet, Black 5048 LPI 2048 Pressure Levels 200 RPS  PC MAC Battery-Free Pen: The pen requires no power, which means that you'll never need to charge internal batteries or use alkaline cells. Crystal Clear HD: Featuring a 1920 x 1080p native resolution, this crystal clear 22-inch display boasts 178 degree horizontal and vertical viewing angles, allowing you to adjust it to the most ergonomic working angle for long-term comfort. angle for long-term comfort. 	 User's Manual (Dec 29, 2015)