The device features broadband pass technology, offering enhanced sensitivity in detecting electromagnetic frequencies compared to other EMF meters. It includes 5 color-coded LED indicators to represent different levels of magnetic field strength. Suitable for both indoor and outdoor use when measuring electrical devices or power lines. Measures a wide spectrum of EMF from 50 to 20,000 Hertz. Designed to detect electromagnetic fields with high sensitivity. Simple, user-friendly design and lightweight for easy handling. 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) LED indicators: 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 (20+ mG) Operating temperature: -18°C to 49°C (0°F to 120°F) Power source: 9V battery Weight: 170g Color: Black Material: ABS, Electronic components Dimensions: 14.6 x 5.8 x 25.5 cm Package Contents: 1 x K-II Electromagnetic Field Meter 1 x Instruction Manual Note: Light and display settings may cause slight color variations between the product image and actual item. Measurement may vary by +/- 1-3 cm.