Features: Accurately measure electromagnetic radiation from phones, and electronics with this USB rechargeable detector, featuring monitoring and high precisions sensors for reliable environmental safety assessments. ABS construction houses a large screen with interfaces, delivering clear radiation readings and easy operate for both professional and home users. Ideal for family, office workers, and frequent traveler seek to monitor electromagnetic exposure in living space or mobile environment. Use near routers, during travel with electronic devices, or in workplaces to identify and potential radiation risks around computers and appliances. Proactively guard your well being with radiation detection, combining lightweight design and USB charging for continuous protections against invisible threats. Specifications: Material: ABS Measuring Bandwidth: 5Hz-3500MHZ Operate Temperature: 0-50℃ Accuracy: 1v/m Ranges: 1-1999v/m Alarm threshold: 40v/m Charging Method: USB Charging Size: about. 61x25x134mm/2.4x0.98x5.28in Package Includes: 1pc Electromagnetic Field Radiation Detector note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.