Resolution :16000×12000 Writing Way:Use electronic Pen to write and operate Induction Way :Electromagnetic Induction Precision :0.05mm Calibration:5 points, 9points Sensing Height :1CM PC interface :USB 1.1/ Wireless transmission(optional) Process Speed :480 dots/second Operation system :windows98/2000/2003/xp/vista/window 7 Power Consumption :< 1W Power Supply :USB power, no extra power supply Surface Film :The hard-coated polyester surface is tear proof, optimized for projection, compatible with dry-erase markers and easily cleaned with whiteboard cleaner.