for enjoying wireless Bluetooth world， you can have a try of this 3240 Wireless Bluetooth Optical Mouse. Employing advanced Bluetooth technology， it will make your online communication and work more convenient and quick. Supporting Windows 7/XP/Vista， it is convenient and excellent to use. High technology and advanced design make it feature accurate response and ultra-smooth tracking. It is designed with Bluetooth chip and Bluetooth interface， and you can communicate with devices which have built-in Bluetooth in the range around you. It must give you every satisfaction!                                    Features            Support Bluetooth wireless transmissionSmooth and quick response buttonsErgonomic and humanized design for comfortable operateLow voltage is energy-savingMake you enjoy wireless operation freelySupport Windows 7/XP/Vista， plug and playThe DPI can be adjusted                                                            Specifications            Interface    Bluetooth Wireless Transmission    <br>Optical Resolution    2000 DPI    <br>Battery Type    AAA Battery    <br>Dimensions    (4.57 x 2.8 x 1.54) " / (11.6 x 7.1 x 3.9) cm (L x W x H)    <br>Weight    2.29 oz / 65 g    <br>Power Supply    2 x AAA Batteries(not included)    <br>Supports System    Windows 7/ XP/ Vista    <br>Color    Black    <br>Button    2 Buttons + 2 Page Up/ Down Buttons + 1 Scroll Wheel + 1 CPI    <br>Mouse Type    Bluetooth Optical Mouse    <br>Voltage    DC 3V    <br>Current    Min: 0.2mA; Max: 12mA    <br>Operating Distance    590.55 " / 15 m    <br>                                                            Package Includes            1 x Bluetooth Optical Mouse