Countdown target time from 9:00 (max set 9:59), last min is countdown of seconds, from 0:01 to :00.
Wireless data transmission module to link with one being master setting duration times, start .One master timer and two slaves could be synchronized displaying within communication distance.
After 1 second of sound of horn, starting/restart (keep) timing. And after stops/pause, there is 3 seconds of sound of horn.
When master timer is turned off (no sound of horn, no display), the timing is paused, when it is turned on (with display), timing is keep going (still no sound of horn).
Turn power on at the beginning of day, turn power off at the end of day, still no sound of horn.
Master timer with master remote control, slave timer with slave remote control.
