TEKMAGIC W70 Mode D'emploi page 7

5.4 Press the RESET button twice to show the 2nd lap read, the watch is still working for the third
lap time counting.
5.5 Press RESET button twice to show more lap reads.
5.6 Press the RESET button once, then press ST/STP button to stop timing.
5.7 Press the RESET button to clear.