... precise heart rate test alarm, stopwatch for daily use calorie counter watch Multifunctional heart rate monitor watch The main functions:1 ... alarm,stop watch,training level, calorie,EL light,alarm,Visual LCD size22*21mmUnit Product Size275(L) x 43.6(W) x ... .10 mmBattery typeButton cell CR2032 x 1pcsBattery typeover12 month Calorie Counter Pulse Rate Wrist Watch, Sports Watch, HRM-2518