PLEASE READ the last pic for all the info on this amazing thermometer! Brand new! DIHEA Basal Thermometer - Soft Tip Ovulation Thermometer - High Accuracy 1/100th Degree - Perfect Basal Temperature Monitor for Natural Family Planning EXCELLENT FERTILITY TRACKING: Determine your pattern of the cycle is the first step for ovulation tracking. Using basal body thermometer every day to chart your body temperature and predict ovulation.