Blue iMicro 3D Optical Wireless Mouse with Thumb-Size USB Receiver iMicro MO-16SBL 3-Button Wireless 3D Optical Scroll Mouse General Features: Color: Blue USB receiver interface 3-Buttons 800 dpi 27 MHz radio frequency 256 ID channel Scroll Wheel (acts as third button) 3D Optical Technology Plug and Play Ambidextrous design Small, compact size, perfect for traveling Ideal for Notebook computers Battery saving technology turns off mouse when not in use