(1) Based on independent sales data (in units) including all the models of the MK270 family for wireless combo aggregated from major markets: CA, CN, FR, DE, ID, KR, RU, SE, TW, TH, TR, UK, US (Apr'19 - Apr'20). Retail channel only. (2)Battery life may vary based on use and computing conditions. (3)Based on throughput computation in bits/second combining speed and accuracy averaged for all devices participating in the study. Logitech Ergonomic Lab study on 23 participants in (Oct / 2019) with four Logitech standard mice and two standard, embedded trackpads (4)Based on bits/second for averaged movement time for all devices participating in the study. Logitech Ergonomic Lab study on 23 participants in (Oct / 2019) with four Logitech standard mice and two standard, embedded trackpads (5)Wi... Show More (1) Based on independent sales data (in units) including all the models of the MK270 family for wireless combo aggregated from major markets: CA, CN, FR, DE, ID, KR, RU, SE, TW, TH, TR, UK, US (Apr'19 - Apr'20). Retail channel only. (2)Battery life may vary based on use and computing conditions. (3)Based on throughput computation in bits/second combining speed and accuracy averaged for all devices participating in the study. Logitech Ergonomic Lab study on 23 participants in (Oct / 2019) with four Logitech standard mice and two standard, embedded trackpads (4)Based on bits/second for averaged movement time for all devices participating in the study. Logitech Ergonomic Lab study on 23 participants in (Oct / 2019) with four Logitech standard mice and two standard, embedded trackpads (5)Wireless range may vary based on environmental and computing conditions (6) Excludes plastic in printed wiring assembly (PWA), receiver, and packaging. Show Less