Skque USB 3-Button Optical Scroll Mice Mouse w/Blue & Red LEDs for Notebook Laptop Desktop Brand New Generic Bulk Package Bottom and back light up red USB interface (4-foot cable length, approximate) Precise optical technology 800 dpi resolution 3-button design Scroll Wheel (acts as third button) Style and comfort in the palm of your hand PC and Mac compatible Regulatory Approvals: FCC CE 3-Button USB Optical Scroll Mouse General Features: Color: Black/Clear Scroll wheel lights up blue