ASUS PEN SA300 stylus pen 16 g Black, SilverA Touch of Genius ASUS PEN SA300 is an USI method active stylus pen with an elegant and intuition design appearance. Aluminum material used in the shaft of a pen giving the comfort while using. Its pressure sensitive tip replicates a natural writing experience, and with up to 9 months of use without needing to replace the battery, you'll be able to use ASUS PEN SA300 whenever and wherever you want. ASUS PEN SA300. Device compatibility: Universal,