?COMPATIBILITY - The Digiroot stylus is universal, it is compatible With All Capacitive cell phones, tablets, touch screen laptops /PC, e-Readers. (Apple iPad,iPhone,iPod,Kindle,Tablet, Galaxy&more) | ?PRECISION - The stylus pen for ipad transparent disc allows you to see exactly where your mark is pointing and give you supreme accuracy . You will be able to use your device in a way that is just not possible with a regular stylus. | ?SENSITIVITY - Digiroot Touch screen pen is the most responsive passive stylus in the market, no battery required. Easy to use and carry around. | ?DIMENSION - 5.7inch/145mm(L) x 0.35inch/9mm(Dia); Precision Disc Tip -0.27inch/6.8mm(Dia) connect with a 2mm rubber point (please don't remove the clear disc from the tip, or the tip won't work); Fiber tip- 0.24inch/6mm(Dia). | ?PRODUCT SUPPORT: Customers can get a full refund within 30 days or get a new product for free within 1 year due to product quality problems. We stand behind our products, please feel free to contact us via amazon "contact us" button.