Note: 1. Mouse is connected via bluetooth-compatible, No USB Receiver. 2. Need 2*AAA battery, Battery is not included. Silent micro motion switch,noisereduced by 95% Precise Positioning 800-1200-1600 DIP switch Ergonomic Shape Long-term usewill notcause exhaustion Mmultiple Colour Meet your different needs Widely Compatible Compatible with laptops, tablets,mobilephone and other devices Q1: Is a Bluetooth mouse compatible with all computers and devices? A1: Computers and devices have their own Bluetooth, so they can be connected and used. Q2: Can I connect multiple devices to a Bluetooth mouse simultaneously? A2: No, a mouse can only be connected to one device at a time. Q3: How do I pair a Bluetooth mouse with my computer or device? A3: You can connect the device directly by turning on the mouse Bluetooth switch. Q4: Does a Bluetooth mouse require batteries to operate? A4 :Yes, you need a 5AA battery.Products are shipped without batteries. Q5: Can I use a Bluetooth mouse without a USB dongle? A5: Yes, a Bluetooth connection will do. Q6: How far away can I use a Bluetooth mouse from my computer or device? A6: Within 5 meters Q7: What is a Bluetooth mouse and how does it work? A7: A mouse with Bluetooth function, can work by turning on Bluetooth to connect a computer or other electronic devices. _x000D_