Features: Lightweight and portable, with built-in high-accuracy chip,practical and reliable e. With large, clear-definition color screen and large, colorful font designs, it can easily cope with dim and bright environments to give you more comfortable experiences. Sound&Light Alarm: When the detected data beyond the safety value, it will emit sound and light to alarm you.Data lock function, one-button lock radiation value for you to read the detected data more convenient. Portable Size: The small size of this tool very convenient for everyday use, you can hold it in one-hand e easily. The LCD display screen has the backlight for you to open or close according to your need, and it also show you the graphics display radiation trend. Specifications: Material:ABS Unit:V-m Accuracy:1V-m Range:1~1999V-m Alarm threshold:40V-m Reading display:3-1/2digit LCD Measurement bandwidth:5Hz~3500MHz Operation temperature:0~50 Power: 3.7V lithium battery Size:Approx. 6.1x 2.5x 13.4cm/ 2.4''x 0.98''x 5.28'' Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x EMF Meter