Technical Specifications: Brand:TeckNet Bluetooth Mouse BM307 Operating System:Windows 98/ME/2000/XP/VISTA/Windows7/Windows8/WIN10 Button Count: 6 buttons Wireless Version: 3.0 Number of Channels: 16 Resolution: 800/1200/1600/2000/2600DPI Operating Voltage: 3.0V Operating Current: 5.5 mA Battery :2 x AAA size battery (NOT INCLUDED). Dimension: 106 x 67.8 x 38.5mm Weight: 72.8g Button Life : More than 8,000,000 click Product Contents: 1 x BM307 Wireless Mouse 1 x User Manual 1 x Warranty Card Intelligent Power Saving (IPS) The mouse is equipped with Intelligent Power Saving (IPS) function. When the mouse is not operated for 3 seconds, it will automatically drop to the first level of IPS. To wake the mouse, click any button or move the mouse. When the mouse is not operated for 10 seconds, it will automatically drop to the second level of IPS. To wake the mouse, click any button or move the mouse. When the mouse is not operated for 8 minutes, it will automatically drop to the third level of IPS - sleep model. To wake the mouse, click any button or move the mouse. DPI Switch The mouse supports 2600DPI, 2000DPI,1600DPI, 1200DPI and 800DPI. To switch to either setting, press the DPI button. The default setting is 1200DPI.Click the DPI button on the top of the mouse once to switch from 1200DPI to 1600DPI, the second click to upgrade to 2000DPI, the third click to upgrade to 2600DPI,click once again to switch back to 800DPI. Low Power Indicator The mouse is equipped with low power indicator. When the battery power gets low during the period of use, the indicator under the scroll wheel will flash. Please replace the battery. Note: We recommend you to use AAA alkaline dry cell battery.