Features: Adopts advanced Bluetooth 3.0 technology， transmission distance is up to 10m (3.3ft). No USB receiver is needed if your computer possesses Bluetooth function. But if your computer does not have this function， please take a Bluetooth dongle first. (Bluetooth dongle is not included in this item.) Designed with a DPI key to adjust its operation speed (800dpi， 1200dpi， 1600dpi). Specially designed with a mini on/ off switch， it can turn on/ off this mouse and its blue LED light. Sleep mode for saving energy. Compatible with: PC， Macbook， laptop， ultrabook， etc. Support Windows XP/Vista/ WIN7/8， original Android 4.0 and above， MAC OS， etc. Ultrathin appearance， ergonomic design， comfortable touch feeling. Lightweight and portable， easy to carry and use. Specifications: Color: black Material: plastic Connection method: Bluetooth Bluetooth version: 3.0 Working distance: 10m/ 32ft Tracking method: optical Resolution: 800/ 1200/ 1600DPI (adjustable) Power supplied by: 2 * AAA batteries (not included) Item size: 11.1 * 6.1 * 2.8cm/ 4.3 * 2.4 * 1.1in Item weight: 70g/ 2.4oz Package size: 14.5 * 10.8 * 4.5cm/ 5.7 * 4.2 * 1.7in Package weight: 104g/ 3.6oz Packing list: 1 * Bluetooth mouse 1 * User manual