Features: 1. Using a large LCD screen, the values are clearly displayed on the screen, which is more convenient to read and has a better experience. 2. The radiation assessment function can indicate whether the current radiation value is at a safe level. Three-color light indicates the current magnetic field status: safety, warning, avoid. If the electric field data exceeds the safe state, the screen will turn red to remind you. 3. Sound and light dual alarm function, when the detected value exceeds the safe value, it will automatically alarm. 4. Small and portable, easy to carry, can be used with one hand, carry it with you, and use it whenever you want. 5. Wide range of applications: The tester can be used in residential and apartment, office, outdoor and industrial places. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: ABS Power supply: 3*AAA batteries (not included) Product size: 130*64*27.5mm/5.1*2.5*1.1in Electric field: V/m Magnetic field: uT/mG Electric field: 1V/m Magnetic field: 0.01uT/0.1mG Electric field: 1-1999V/m Magnetic field: 0.01-99.99uT /0.1-999.9mG Alarm threshold: Electric field: 40V/m Magnetic field: 0.4uT/4mG Measurement bandwidth: 5Hz-3500MHz Sampling time: about 0.4 second Overload indication: LCD measuring range max. Working temperature: 0-50 Working humidity: below 80% relative humidity Working voltage: 4.5V includes: 1 x Electromagnetic Radiation Detector ( Not including battery)