Logitech Play Collection M325c Mouse - Optical - Wireless - Radio Frequency - Usb - 1000 Dpi - Tilt Wheel - 5 Button[s] - Waterm Full Product Specifications:Click to view / Pointing Device Connectivity Technology:Wireless / Pointing Device Wireless Technology:Radio Frequency / Movement Detection:Optical Number of Total Buttons:5 / Scroller Type:Tilt Wheel / Printed Design/Pattern/Texture:Watermelon / Pointing Device Host Interface:USB Width:2.2" / Depth:3.7" / Weight (Approximate):3.28 oz / Package Contents: Play Collection M325c Mouse, Nano Receiver, 1 x AA Battery (Pre-Installed), User Documentation,