Display alarm temperature and current temperature; With clock and countdown; Can place on table or hang up; Accuracy: +/-1~+/-3'C; Resolution: 1'C; Countdown: 23hours 59minutes 59seconds; Power: 1 x AAA battery; Operation: Clock / Timer key: shift clock and timer function, or press for 2s to set time; UP / DOWN key: set alarm temperature; Alert key: open / close temperature alarm; HR key: set time or hours of countdown; MIN key: set time or minutes of countdown; START / STOP key: start / stop countdown; With 'C / 'F shift key in the back.