Feature 1Better Testing: Able to test electric field, magnetic field and temperature, this EMF detector has wide test range and high accuracy. 2Simple Reading: Digital display together with data locking function enables easy reading, which also largely simplifies the operation. 3Practical Uses: Suits perfectly for home, office, outdoor and industrial sites, mobile phone, computer, TV, refrigerator and so on. 4Clear in Alarm: With 0.4s sampling time, the EMF meter with high sensitivity will automatically send sound and light alarm for safety. 5Easy Carrying: Comes with a light weight and a compact size as well, the electromagnetic radiation tester is very convenient to carry.Item Type: EMF DetectorBattery: 3 x AAA 800mAh alkaline dry battery, shipped with supporting battery. Electric Field Range: 1V or m-1999V or m, unit: V or m, accuracy: 1V or m, alarm threshold: 40V or m. Magnetic Field Range: 0.01 T-99.99 T, unit: T, accuracy: 0.01 T, alarm threshold: 0.4 T. Temperature Range: -10 - 70, unit: or , accuracy: 0.1 or .Reading Display: 3-1 or 2 bit LCDTest Bandwidth: 5MHz - 3500MHz. Sampling Time: About 0.4sTest Mode: Dual mode simultaneous test. Operating Temperature: 0 -50Operating Humidity: 80 percent RH . Package List1 x EMF Detector3 x Battery