2.4G Wireless Mouse Pen Ergonomic Portable Pen Mouse USB Receiver Silent Optical Mouse for Laptop PC Office Home

High-concerned chemical : None Power Type : Battery Number of Rollers : 1 pcs Hand Orientation : Right Package : No Style : Mini DPI : 1000 Interface Type : USB Battery Included : No Type : 2.4Ghz Wireless Operation Mode : Opto-electronic Number of Buttons : 4 ●Power saving: if there is no 2.4GHz signal, it will automatically power off. Product Descriptions: Power saving: if there is no 2.4GHz signal, it will automatically power off. Specifications: *Operating frequency: 2402MHz-2480MHz *Transmission distance: >10M,360° *Resolutions Adjustable: 500/1000cpi *Tracing system: Opitcal *Operating current: 15mA *Power supply: 1.5V AAA*1 (we don't send it) *System requirements: for Windows98, XP, vista, Windows7, Tablet PC, OS X, Linux Package contents: Label:Yes