Low noise， quite when click， no disturbtion to others.  Features:  Bluetooth technology， more convenient compared with that with usb cable.  Ergonomic design， convenient and comfortable to use.  1000/1400/1600 adjustable DPI， meet your different need.  Great for PC tablet smartphone.  Note: make sure your device is bluetooth accessable before use.And for ipone paring， mobile jailbreak first.  Specifications:  Type: bluetooth mouse  Version: bluetooth 3.0  Color: white / black (optional)  Battery: 1 * 600mA li-battery (included)  Item weight: 50g / 1.76oz  Item size: 6 * 11.5 * 2.5cm / 2.36 * 4.52 * 0.98in ( L * W * H )  Package weight: 66g / 2.33oz  Package size: 12 * 6.5 * 3cm / 4.72 * 2.55 * 1.18in ( L * W * H )  Package list:  1 * Mouse  1 * Charging cable