Product Type: e Capacitance Touch Pen. Authentic Xundd product. Main Functions: Painting, Writing, Note-taking. Material: Aluminum Alloy (Metal Pen). Battery Specification: Lithium Polymer Battery 140 mah5V/0.2A. Use time: 8 hours. Charger interface: MICRO USB. Compatible with both IOS and Android devices. Sensitive to pressure and tilt so you can easily vary line weight, create subtle shading, and produce a wide range of artistic-just like with a conventional pencil, but with pixel-perfect precision. High precision ultra fine copper tip. Charging for one hour, battery life for 8 hours. Auto-off when idled for 30 minutes.