Fangrui Product Details 1. Simple Design And Color Matching 2. 8192-level Passive Pressure-sensitive Pen, Passive Wireless Electromagnetic Pressure-sensitive Pen Technology, Free Of Charging And Battery-free, 8192-level Pressure-sensitive Notebook Presents More Painting Details, Precise Positioning And Low Delay, And Truly Reproduces Your Works 3. Professional Board Drawing Tool, Design Professionals/students/painting Lovers/gifts For Children 4. The Mobile Phone Can Also Be Used As A Hand-painted Board, And The Otg Adapter Is Used To Connect The Digital Board And The Android Phone/tablet To Easily Start The Road Of Board Drawing 5. The Mobile Phone And Digital Tablet Can Be Drawn Horizontally Or Vertically Product Model: T503 Support Interface: Usb Application Technology: Electromagnetic Induction Induction Level: 8192 Level Reading Speed: 233 Points/s Voltage And Current: 5v Less Than45ma Support System: Windowsxp/vista/7/8/10 (32bit/64bit) Android (above 4.0) Os X10.7-10.13 Note: Different Batches May Have Differences In Pr