Key Features; 4 Programmable Press Keys Battery-Free Pen with Electromagnetic Resonance Pressure Levels: 4096 Levels Pen Resolution: 5080 LPI Working Area (Android Mode): 4.76 x 7.62 cm Working Area (PC Mode): 12.19 x 7.62 cm (4.8 x 3 inch) Reading Height: 10mm OS SupportWindows 7 or later, MacOS 10.11 or later and Android 6.0 or later