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