[M] ROCCAT Savu Mid-Size Hybrid Gaming Mouse Review
 

Savu is a mid-sized mouse that may not be very suitable for people with big hands, built from quality materials and offers no-sweat rough plastic side grips for maximum precision in games. It features an adjustable 4000DPI Pro-Optic (R3) gaming sensor, with adjustable polling rate up to 1000Hz, Teflon feet for minimum friction and a 1.8m braided USB cable. A total of 4 buttons can be remapped (left and right mouse buttons, the scroll wheel button and one lateral), the fifth having Easy-Shift [+] functionality, meant to double the mappings for the programmable buttons.

http://www.madshrimps.be/articles/article/1000305/