UNHO Stylus Pens Ultra-sensitive Capacitive Screen Pen USB Charging 2.3 mm High Precision Capacitor Stylus Screen Touch Drawing Ball Point Pen for Iphone Ipad Samsung Tablet (Black) Active Capacitive Stylus can Charging by USB 2.3mm pen tip brings high-precision positioning experience Pen body diameter 13mm, length 150mm, lightweight and portable 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 8 hours