Logitech M515 Couch Mouse Red Dragon 910-002434 with Unifying receiver

 Logitech M515 Couch Mouse Red Dragon 910-002434 with  Unifying receiver Hand-activated power Your hand instantly activates the mouse so it's only "On" and ready when you are Stays asleep when you're not using it to conserve battery power   Long-lasting power 2 full years of battery life means you almost never need to change batteries On-Off switch and smart sleep mode save power Battery indicator light eliminates surprises   Easy-gliding sealed base Rounded base lets you move the mouse effortlessly across uneven surfaces like a crumpled blanket Sealed bottom—fabric fuzz won't collect in the sensor opening so you always get accurate tracking  Plug-and-forget Logitech Unifying receiver Reliable wireless connection with virtually no delays or dropouts So tiny it can stay safe and secure in your laptop Add compatible devices like a wireless keyboard without multiple receivers filling up your USB ports.   System requirements: Windows 7 Windows Vis