Quantity: one Color: Black Material: ABS Weight: 101 g Size: 14.3 cm x 2.9 cm x 5.3 cm LED display: LED light easy to read in darkness and sunlight. Special 5 LED indicators represent different radiation values. Function: For paranormal wave research and general EMF testing, helps measure electromagnetic fields to identify devices producing high radiation and allows users to decide whether to limit exposure. Distance: K2 flow meters are often used during ghost hunting, but also for personal safety, by identifying potentially harmful electromagnetic radiation. Measures a wide spectrum from 30 Hz to 20,000 Hz and can record cell phones up to 2 feet away. Power: Operates on a single battery and reports EMF measurements in the 5 milligauss range (batteries not included). This makes the K2 EMF instrument the perfect tool for detecting mental activity and uncovering potentially dangerous EMF levels at home or at work. EMF Radiation Detectors: K2 flow meters are known for their reliability and quality in paranormal investigations. EMF levels are measured to prevent potentially harmful long-term overexposure to EMF. Good quality product