The button battery is already installed, so you can start immediately. The cell is very small, when screwing I discovered through a magnifying glass the name L 736. These button cells there are very cheap at Amazon. Inserting is very easy, just use a paper clip or a dime, screw on the lid, insert coin cell, ready.
To measure again, press the clearly visible "power button", then "beeps" the unit again. If you can C ° room are in this state in a 18, the display shows "L" as "low", ie at too low a temperature. The measurement of body temperature took about 13 seconds for me. When the measurement is finished, you will hear with "beep, beep, beep" a clear audible signal.
The display is easy to read, a stable plastic sheath is included. The Omron thermometer is a practical utensil, which -through favorable Batteries- remain inexpensive in operation.
