Exclusive technology provides an active user feedback light that signals that the probe has positioned in a stable way throughout the measurement, avoiding inaccurate measurements by handling errors. Thermoscan disposable probe covers help with protection of patient and user. They are designed for patient comfort, disposable covers help protect the unit, user and patient from potential cross-contamination. Measures in either Fahrenheit or Centigrade. Beeps once to indicate correct positioning and 4 times for measurement completion. Auto shutoff extends battery life. Operates on one DC-3V lithium battery (battery is included and lasts for approximately 2000 measurements). Weighs only 1.8 oz.