Q&A Q1. I ordered wirele USB mouse, But I can not see the USB in my package ? A1. The USB receiver is at the bottom of the mouse. You could see our instruction map. Q2. Bluetooth Mouse only have Bluetooth ? Can I use USB receiver? A2. Bluetooth version is Bluetooth + 2.4G USB Adapter, If your device has Bluetooth function, you can use the Bluetooth mode of the mouse. If your device has only a USB interface and no Bluetooth function, please use the mouse's wirele 2.4G mode, and you can use it after you plug in the adapter Q3. Why the cursor can't locate accurate ? A3. When the mouse cursor can't locate accurate, the mouse need to be charged. Q4. How can I know it is charging , or it is charged ? A4. When charging , the scroll wheel is blue light. When charged, the scroll wheel light is OFF. Features Rechargeable: Built-in rechargeable battery, can be used 1 months after only 2 hours charging Accurate tracking: Uses profeional IC, positioning accuracy High resolution: 800-1200-1600 DPI high resolution for fluid motion Silence key: Silence key for clicking silence Fashionable slim design: Slim design for sleek look and portable use Description: Elegant and ergonomic design, perfect to match your laptop or PC. Easy to install, plug USB receiver and play. Suit for desktop computers, notebook computers. Package Included: 1 x Wirele Optical Mouse 1 x 2.4G USB Receiver(hiden in mouse) 1 x USB charging cable