From the manufacturer, the Logitech NEW MX Vertical Wireless Mouse's advanced ergonomic design reduces muscle strain and is rechargeable in graphite. February, March, April, May, June, July, August, and September October November December 12345678910111213141516171819202122232425262728293031202220212020201920182017201620152014201320122011201020092008200720062005200420032002200220012000199919981997199619951994199319921991199019891988198719861985