The K2 flowmeter runs on battery (not included) and reports EMF measurement values in the range of 5 milligauss. It is used for supernormal wave research and general EMF testing. Key benefits Quick, ataglance EMF screening with a dedicated 5LED indicator that represents different radiation values. Clear, colorcoded guidance across common EMF ranges to help you understand exposure levels at a glance. 50/60 Hz monitoring to reflect the frequencies most relevant to everyday electrical environments. Portable and easy to use for onsite checks, with reliable and responsive performance. What it does Special function: 5LED indicator light shows radiation values for fast interpretation. Application of 50/60Hz frequency monitoring to reflect common electrical environments. Color mapping for EMF levels: dark green 0 to 1.5 mgauss; green 1.5 to 2.5 mgauss; yellow 2.5 to 10 mgauss; orange