The Lenovo Essential Compact Wireless Mouse designed with your convenience in mind It&8217;s easy to get more done when you don&8217;t have to waste time untangling messy cables or searching the office for new batteries Its compact size makes it the perfect companion no matter what the occasion Slide it into your pocket backpack or laptop bag and you&8217;re ready to goMouseButtons typePressed buttonsPurposeOfficeRecommended usageUniversalScrolling directionsVerticalScroll typeWheelNumber of scroll wheels1CertificationANATEL ANRT CAK CB CE CERT CITC CITRA CONATEL cTUVus ETA FCC IC ICASA ICT IDA IFETEL MIC MTC NCC NTC SDoC SDPPI SIRIM SRRC SUBTEL TRA TRC TUV Mark VCCIMovement detection technologyOpticalButtons quantity3Device interfaceRF Wireless