... Description General Features ] 2.4G wireless mouse;Mini size ,best for notebook users or kids Wireless freedom 2.4GHZ Muliti-channels ( ... 4.0 :Reliability Button switch activation:3,000,000 cycle Scroll wheel encoder activation : 100,000 cycle Operating temperature : ... 90%RH[ Reliability ] Button switch activation:3,000,000 cycle Scroll wheel encoder activation : 100,000 cycle Operating temperature : -5 ...