Upgrade to smarter scrolling, better comfort, and more productivity. The Signature M650 features SmartWheel scrolling that delivers precision or speed the moment you need it. The plastic parts in Signature M650 include certified post-consumer recycled plastic to give a next life to plastic from old consumer electronics and help reduce our carbon footprint. - Rose plastics: 26% of recycled material - Off-white plastics: 26% of recycled material - Graphite plastics: 64% of recycled material - Graphite plastics: 65% of recycled material - Blue plastics: 57% of recycled material - Red plastics: 57% of recycled material *Excludes packaging, printed wiring assembly, receiver