... time is 000 00:00:00),the timer count down to 000 00:00:00 and stop. Operation:A, B, ... time as follows:1,Press button C for 3 seconds to go to modulation states ( then you will see letter is flash ... );2,Press button B to count finger,Long press for counting finger automatically.3, ... button C for one time( less than 3 seconds) to choice days,hours,Minuts or seconds.4,Press button D ...