4 DPI: This laptop mouse provides 4 adjustable DPI(1000/1600/2400/4000), providing accurate and stable control, greatly improving your work efficiency. TRIPLE MODE: This office mouse supports dual BT5.1 connection and 2.4G wireless connection. Stable BT and USB wireless support 3 devices connection, so you can easily switch. SILENT CLICK: This ergonomic mouse also adopts silent design, thus the click noise will be reduced by 90%, perfect for home, office, cafe, and other public places. ADJUSTABLE VOLUME: This gaming mouse is able to control volume via long press the DPI button for 2 seconds, then rolling the scroll wheel to adjust the volume. ERGONOMIC DESIGN: This wireless mouse with side buttons features ergonomic design, which ensures comfort and accuracy, relieving hand fatigue.