Logitech G603 LIGHTSPEED Wireless Gaming Mouse (Renewed),This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com,Next-gen HERO optical sensor for unrivaled performance and power efficiency delivering 500 hours of non-stop gaming,Advanced LIGHTSPEED wireless technology for super-fast 1 ms response time and faster than wired performance,Connect to multiple devices using either LIGHTSPEED or Bluetooth and easily switch between the two with a push of a button,Built for comfort with an ergonomically-designed, lightweight, contoured body. Adjust weight by using one or two batteries,