The Certeza Digital Thermometer FT 705 is a medical device used to measure body temperature accurately and quickly. The thermometer has a digital display and can give you a temperature reading in Fahrenheit or Celsius. It is usually placed under the armpit, but can also be used orally or rectally. To use the thermometer, you need to turn it on and place it under the armpit, or alternatively, the tip of the thermometer can be inserted in the mouth or rectum. The reading will be displayed on the screen after a few seconds. It is important to clean the thermometer before and after use with rubbing alcohol or soap and water to prevent the spread of germs. It is also important to follow the manufacturer's instructions and consult a healthcare professional if you have any concerns or questions.