Fangrui Product Details 1. 5 Led Electromagnetic Field Emf Gauss Meter Ghost Hunting Detector 2. Instant Response To Electromagnetic Field Fluctuations And Spikes. 3. Easy To Read Led Cursor In Dark And Sunlight. 4. Portable, Easy To Use, Rugged, Reliable, Responsive And Radiation Resistant. 5. Uv-responsive Color Labels 6. For Paranormal Wave Research And General Emf Detection Use. 7. Emf Flow Meters Are Often Used During Ghost Hunting And Also For Personal Safety To Identify Potentially Harmful High Emf Radiation. The Reliability And Quality Of Emf Flow Meters In Paranormal Investigations. This Makes Emf Meters A Tool For Detecting Psychic Activity And Finding Potentially Harmful High Emf Levels In The Home Or Work Environment 8. The Emf Meter Can Be Used Indoors Or Outdoors To Measure Any Electrical Device Or Power Line. 9. There Are 5 Leds, Each Representing A Range Of Field Strengths, As Follows. 10. -green - "normal" Zone - Normal Background Magnetic Field. 0 To 1.5 Milligauss 11. -green - "low" Zone - Low Level Magnetic Field. 1.5 To 2.5 Milligauss 12. -yellow - "caution" Zone - Moderate Magnetic Field. 2.5 To 10 Milligauss 13. -orange - "high" Zone - High Intensity Magnetic Field. 10 To 20 Milligauss 14. -red - "warning" Zone - Very High Magnetic Field. 20+ Milligauss 15. Material: Abs Housing 16. Power Supply: 1 X 9v Battery (not Included) 17. Dimensions: 14.3 X 5.3 X 2.2cm