Here"s a unit which will give you not only accurate digital readings of the amount of leakage from microwave ovens, but it also provides an audible "beeping" alarm and red flashing light when it senses microwaves above the 5 mW/cm² danger threshold! Ergonomically designed to fit comfortably in your hand, it is so easy to use: just press the ON button, then press and hold the auto range ZERO button to adjust to zero before each use. Then check the seal of the operating oven door. Sensitivity down to 0.01 mW/cm² at 2450 MHz, it will read all the way up to a roasting 9.99 mW/cm² in hundredths of mW/cm². Battery operates for more than 12 months under normal use. Never needs re-calibration. Excellent reliability and high precision instrument. Complete with carry case to keep your unit in perfect condition.And as a bonus, this unit can be used to measure radiated power from other wireless devices using the 2450 MHz analog frequency. Has nice carry case and backlit display. Uses one 9V battery (included) or can be powered by optional external AC/DC9V adapter. One year wty and ±1dB accuracy. This is the unit we recommend if you need more information about your oven leakage. CE compliant.