1One instrument used for two purposes, can test both electric and magnetic field radiation stimutaneously. 2Sound and light alarm: When test result exceeds the safe value, the instrument will automatically alarm. 3Data locking: Press one button to lock the radiation value. 4Radiation assessment: To Remind you of making sure whether the radiation value is in the safe range. 5Large and clear LCD display screen for easy reading.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.Radiation assessment: To Remind you of making sure whether the radiation value is in the safe range.Large and clear LCD display screen for easy reading.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); T(Magnetic Field) Accuracy: Electric: 1V/m; Magnetic: 0.01T Range: Electric:1-1999V/m; Magnetic: 0.01-99.99T Alarm Threshold: Electric: 40V/m; Magnetic: 0.4T 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: 0~50C Relative Humidity:Storage Temperature: -10~50C 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.