Features: Brand new and high quality The small size of this tool is very convenient for everyday use, you can hold to use easily. 8+1 LED lights for you to read the testing results and the power in the dark and in the sunlight. The special function 8-led indicators represent different radiation values, the green lights mean "normal zone" and "low zone", the yellow lights mean "caution zone", the orange lights mean "high zone" and the red lights means "warning zone". This tool can be used in your home, electric appliance such as computers, TV, hair dryer, cleaner and other devices. Flowmeters are used for safety to identify potentially harmful high EMF radiation. This tool can help you to understand the environment fully. Specifications: Material:Plastic Color: Black Size: 190x45x27mm / 7.5x1.8x1.1in Package Includes: 1x EMF Meter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.