Etekcity Scroll Black/Grey Wireless USB Optical Mouse for Computer Laptop Notebook with 30ft range, mini 2.4GHz receiver, high-resolution sensor, adjustable DPI, ergonomic right-handed design, five buttons plus scroll wheel, and durable construction. Comfortable to use and features a mini receiver Wireless USB optical mouse with mini 2.4GHz receiver for up to 30ft range Ergonomic right-handed design with two thumb buttons Attractive black and grey color scheme Four buttons plus clickable scroll wheel and DPI switch key Standard USB connection, compatible with Windows, Mac, and Linux