Omron Healthcare Singapore PTE Ltd. Manufactures Basal Thermometer with Ovulation Chart, bearing the model number MC-108L. Omron Healthcare Singapore PTE Ltd. Manufactures all its products in accordance to the RoHS directive. RoHS directive refers to the restriction of the use of certain hazardous substances in electrical and electronic equipments. This type of thermometer measures basal temperature and features two decimal point reading. Basal Thermometer with Ovulation chart detects changes as little as 0.05 degree Celsius. This thermometer has buzzer that beeps when measurement is complete.