Features: LEFT-HANDED ERGONOMIC VERTICAL MOUSE -- Specifically-designed for left-handers, encourages healthy neutral "handshake" wrist and arm positions for smoother movement and less overall strain. Recommended to Repetitive Strain Injuries RSI User and user works particularly long periods on the computer. EASY TO USE, PLUG & PLAY -- Strong and reliable 2.4GHz wireless connection, one nano USB receiver at the bottom of mouse, just Plug and Play! The left-handed mouse dimensions : 5.0*3.0*2.5 inches. Weight: 95g. ( NOT compatibility with Mac OS ) ( Please confirm the size and system before buying it ) MULTIFUNCTION AND CONVENIENT -- Easy access to multiple usage through 6 buttons. Advanced "Page Back" and "Page Forward" functionality buttons provide convenience when web page browsing. 3-level DPI (800/1200/1600) suit both ordinary and gaming needs, with premium optical engine, allows quicker response, smoother tracking and higher precision movement. POWER-SAVING MOUSE -- An independent On/Off switch button on the bottom which helps save energy effectively. Besides, it will automatically enter into sleeping mode after 8 minutes idle. Press right or left button for it to wake immediately. ( 2 AAA batteries needed, not included ) WIDE COMPATIBILITY -- This wireless Lekvey Acedada left handed mouse is compatible with Windows 7, 8, 10, XP, 2000, CE, Vista and Linux. Fit for Notebook, PC, Laptop, Computer and other device. ( The USB receiver is at the bottom of the mouse ) DESIGNED FOR LEFT HANDED HEALTHY ERGONOMIC MOUSE Lefties of the world have to deal with many disadvantages in daily life products. Choosing a comfortable mouse to protect us from daily muscle injury should be easy, but might seem a luxurious wish for most lefties. This Lekvey Left-handed mouse is intersection of class, comfort and functionality for the 21st century. Left Handed Mouse Specification: Item Weight:95g Item Dimension:5.0 x 3.0 x 2.5 in Connection Mode: 2.4G USB Sensitivity: 3 DPI modes: 800-1200-1600 Adjustable Power Source: 2 AAA Batteries needed Wireless Lefty Mouse Compatible Systems : Windows 2000 Windows XP Windows Vista Windows 7 Windows 8 Windows 10 Linux , Android Kindly Note: 1, The previous/next page thumb buttons are not recognized on the Mac OS X 2, Batteries are Not included. 3, This mouse is only for Left handed Streamline design for the most natural position of human wrist. Tired of using the traditional grip? Take a break from overly-clunky or uncomfortably tiny mice. The left handed ergonomically-designed thumb rests and grips fit the contour of your palm for maximum comfort. Easy-access use: Six buttons give you improved control over your computer's systems. Whether dragging and dropping, selecting large volumes of data, or casually gaming, this mouse provides a low-cost, effective solution for multiple computing needs. Package Contents: 1 x Lekvey Wireless Left Handed Mouse 1 x 2.4G USB receiver ( USB Receiver is at the bottom of the mouse ) 1 x User Manual