Logitech M310 3-Button Wireless USB Laser Scroll Mouse w/Nano Transceiver (Blue/Black) Logitech Wireless Laser Mouse M310 General Features: Blue with charcoal color Wireless Laser tracking Comfortable, ergonomic design 3-buttons Scroll wheel Contoured design Soft side grips Includes a Logitech Nano Transceiver Runs on one AA battery (not included) Up to two-year battery life Unit Dimensions: 1.5 x 2.4 x 4.5-inches (H x W x D, approximate) Regulatory Approvals: