onn 6-Button Wireless Mouse, Black Metal quick-scroll wheel 6 clickable buttons, on/off switch, and connection switch Comfortable ergonomic design with finger rest 5 adjustable DPI sensitivity levels: 600/1000/1600/2400/3600 DPI Bluetooth wireless technology 2.4GHz wireless connection with USB nano receiver (stores in battery compartment when not in use) Windows, MacOS, ChromeOS, Android, and iOS compatible USB plug-and-play What’s in the Box? 1- wireless mouse, 1- USB nano receiver, 1- AA battery