... 0.4 seconds Overload Tip: LCD display "1" Operating voltage: 9V Battery: 6F22 9V Accessories: manual, warranty card, 4) measurement procedure 1, press ... be restored, unless there are other interference.5) About the battery 1, when the instrument is smaller test data or not ... . 2, the instrument should be stored when not remove the battery. LZT-1110 Electromagnetic field tester / Radiation Tester #2