Lo m220 silent red 910-004880
*wireless mouse / usb receiver
*connectivity: 2. 4 ghz wireless connection (up to 10m range). *silenttouch technology / 90% noise reduced
*number of buttons: 3 (left/right-click, middle click)
*battery: 1 x aa (included)
*battery life: 18 months (may vary based on user and computing)
