1、If you don't touch the pen for 15 minutes, the pen will switch to sleep mode to save power, and when you want to use it again, just click on any of the side buttons to wake it up.<br> 2、For Microsoft Pro 2017/Pro 4/Pro 3/3/Notebook/Studio/Book, also compatible with for Sony VAIO Duo 13/Duo 11/Asus Transformer3 Series/HP Spectre x360 (2017).<br> 3、No driver required and direct use. The touch screen is supported by N-Trig technology and requires no drivers or Bluetooth settings. Simply put the battery in the pen and you can use it right away.<br> 4、Made of high-quality materials and exquisite workmanship, this product has a beautiful appearance and is durable.<br> 5、Compact and lightweight, it is easy to use, easy to store and carry around.<br> Stylus x 1Tool x 1Replacement Nib x 1<br> Item Type: StylusColor: Black, Silver (Optional)Size: Approx.<br> 14.5 x<br> 0.9 x<br> 0.9cm /<br> 5.7 x<br> 0.4 x<br> 0.4in Battery: AAAA Battery (Not Included)Compatible Models: For Microsoft Pro 2017/Pro 4/Pro 3/3/Notebook/ Studio/Book, also compatible with for Sony VAIO Duo 13/Duo 11/Asus Transformer3 Series/HP Spectre x360 (2017)