Check the mouse manufacturer’s website or product page
Look for the DPI specification in the user manual or box
Use the mouse software or driver app if available
Press the DPI button on the mouse and check the indicator lights or on-screen display
Use Windows mouse settings or pointer speed as a rough reference
Measure cursor movement with a DPI testing website or software tool
Search the exact mouse model online for its DPI range
Contact the manufacturer’s support team for the DPI information