K2 EMF Meter Detector Magnetic Field Radiation Measuring Instrument Detector Features There are 5 various colour LED signals to represent different level of magnetic field Suitable for indoor or outdoor use Measure wide spectrum of EMF from 50 to 20,000 Hertz Identify potentially harmful long term overexposure to EMF Sensitive in detecting electromagnetic field Simple & user friendly device Light weight Specifications Detection range: 0 to 20+ milliGauss (mG) Detection frequency: 50 / 60 Hertz (50 to 1,000 Hz - ELF; 1,000 to 20,000 Hz - VLF) Accuracy: +/-5% (Typical) 5 LED signals for different level of magnetic field: Green (1) - Normal magnetic field (0 - 1.5 mG) Green (2) - Low level magnetic field (1.5 - 2.5 mG) Yellow - Mid level magnetic field (2.5 - 10 mG) Orange - High level magnetic field (10 - 20 mG) Red - Extreme high level magnetic field ( Greater than 20mG) Operating temperature: -18 to 49Celsius (0 to 120Fahrenheit) Power source: 9V battery colour: black Material: ABS size: 14.6*5.8*25.5cm Package Includes 1x K-II EMF Meter 1x Instruction Manual