Features ​EMF meter: one instrument with two uses, can test the stimulation of electric and magnetic field radiation at the same time. Reliable product: with sound and light alarm function. When the test result exceeds the safety value, the instrument will automatically alarm. Easy to use: The radiation value can be locked at the push of a button. There is also radiation assessment. Remind you to confirm whether the radiation value is within the safe range. Design: Compact size, easy to operate, portable and convenient for on-site measurement. Clear display: Large and clear LCD display screen, easy to read. Features: EMF meter: one instrument with two uses, can test the stimulation of electric and magnetic field radiation at the same time. Reliable product: with sound and light alarm function. When the test result exceeds the safety value, the instrument will automatically alarm. Easy to use: The radiation value can be locked at the push of a button. There is also radiation assessment. Remind you to confirm whether the radiation value is within the safe range. Design: Compact size, easy to operate, portable and convenient for on-site measurement. Clear display: Large and clear LCD display screen, easy to read. Specification: Model: GM3120 Material: Plastic Color: Shown As Picture Unit: V/m (Electric Field); μT(Magnetic Field) Accuracy: Electric: 1V/m; Magnetic: 0.01μT Range:  Electric: 1-1999V/m; Magnetic: 0.01-19.99μT Alarm Threshold: Electric: 40V/m; Magnetic: 0.4μT Display: 3-1/2 LCD Display Test Bandwidth: 5Hz-3500MHz Sample Time: About 0.4 Seconds Test Mode: Dual Mode Synchronous Test Overrange Indication: LCD Displays "1" Working Temperature: 0°~50°C Relative Humidity: <80% Storage Temperature: -10~50°C Relative Humidity: 0~70% Power: 1 * 9V 6F22 Battery(excluded) Size: Approx.12.5*6*3cm/4.9*2.4*1.2in Package Weight: Approx.164g/5.8oz Package List: 1 * Emf-Meter Package List