Please note, this item ships from an international seller. Expected delivery is 10-15 days. This Wireless Vertical adopts 2.4G wireless technology which ensures stable connection and offers 3 DPI levels for choice --- 800, 1600, 2400. What's more, with vertical design, it relieves wrist fatigue to some extent. Feature: 2.4G Wireless Technology It ensures the stable connection and free you from the twisting cables. 3 Adjustable DPI Levels There are 3 DPI levels --- 800, 1600, 2400. Free to switch. It offers you a pleasant sensation of higher speed, less delay and more correct location.   Ergonomic Vertical Design Compared with traditional , the vertical design relieves the fatigue of your wrist, and offers you comfortable feeling for touch.  Plug and play No drivers required, just plug USB receiver into USB port of the device, easy to use.  Long Working Time With built-in large-capacity battery, you can use it for a long time. And it is rechargeable, no need to change battery repeatedly. Specification: Color: Black, Grey, Pink, White (Optional) Button: Left, Right, Scroll wheel, Forward, Backward, DPI buttons DPI level: 800/ 1600/ 2400 Battery capacity: 1000mAh Auto sleep mode: Support Supporting system: Compatible with OS/ Windows XP/ Win 7/ Win8/ 10 Material: ABS Package size: 103* 89 * 69mm/ 4.05* 3.5* 2.72in Package weight: Appro. 150g/ 5.29oz Packing list: 1 * Wireless Vertical 1 * Charging cable 1 * USB receiver 2.4G Wireless Technology It ensures the stable connection and free you from the twisting cables. 3 Adjustable DPI Levels There are 3 DPI levels --- 800, 1600, 2400. Free to switch. It offers you a pleasantsensation of higher speed, less delay and more correct location. Ergonomic Vertical Design