The product in the image is a Benetech GM3120 Electromagnetic Radiation Tester, used to measure both electric and magnetic field radiation. Dual Testing: Simultaneously tests for electric and magnetic field radiation. Measurement Range: Electric field: \(1\)-\(1999\text{V}/\text{m}\); Magnetic field: \(0.01\)-\(19.99\mu \text{T}\). Alarm System: Features a sound-light alarm that activates when radiation exceeds the safe threshold. Data Hold: Allows for one-key locking of the radiation value.