AWINNER- Best Fine Point Precision Active Stylus Pen for iPad, Surface,iPhone, & Most Android Tablets, Tablet PC and Smartphones. Machined Aluminum Housing With 2.3mm Durable Tip (Silver) Works with most popular devices: Awinner active pen is compatible with iPad, iPhone, and most Android tablets and smartphones 2.3mm fine point stylus with a durable thermoplastic tip, Flexible ultra fine tip, fast and smooth, writing experience more realistic. Works with the top apps : DotPen works works with any app, including popular apps such as ZoomNotes, Evernote, Paper by FiftyThree, ProCreate, and many more. Active sensing technology, no additional receiver or a Bluetooth device, turn the power can be used Standard USB interface can be realized at any time, the charging time can be used continuously for up to 12 hours Built to last : Awinner Pen is made of precision CNC machined anodized aluminum alloy with a durable soft-touch rubber writing grip.