Features One instrument used for two purposes, can test both electric and magnetic field radiation stimutaneously. Sound and light alarm: When test result exceeds the safe value, the instrument will automatically alarm. Data locking: Press one button to lock the radiation value.Large and clear LCD display screen for easy reading. Radiation assessment: To Remind you of making sure whether the radiation value is in the safe range. Stylish design, compact size, simple operation, easy to carry and convenient for on-site measurement. 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: 0.01-99.99μT 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 * Radiation Tester Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List