Easy Setup: Simply insert the nano USB receiver (stored inside at the back of the mouse) into your computer and use the mouse instantly. Long Life Rechargeable Battery: Rechargeable lithium battery with an industry-high capacity lasts for 4 months with single charge (based on 2 hours¡¯ non-stop use per day). Silent Clicking: Work in the office, home, cafe, library without disturbing anyone around you. Ergonomic Design: Ergonomic mouse reduce stress and use more comfortably. What You Get: Arteck MW162 Wireless Mouse, one nano USB receiver (stored in the back of the mouse), USB charging cable, welcome guide, our 24-months warranty and friendly customer service.