No-Touch Forehead Thermometer is for all ages and gives Accurate Instant Readings. Easy to use, this Digital Thermometer has an LCD Display & Memory log. 4 Step for Using Non-contact Forehead Thermometer 1. Take out the thermometer and open the battery lid to install 2 AAA batteries (Not included). 2. Keep distance at 1cm to 5 cm from thermometer probe to the middle of the forehead. (do not contact forehead directly). 3. Select measurement mode and click the measurement button to start taking temperature; 4. Reading displays on the screen after successful measurement. The non-contact thermometer takes only one second to measure body temperature and can be measured at a distance of 1-5 cm. This No touch thermometer is suitable for infants, children, adults, and elders.