Just received, delivered right to my door - I love the service. This instrument GM3120 is the Pro quality safety device to measure Electromagnetic Field and has Alarm set points. I have find another application of this instrument: as the "bug finder". All the bug devices (hidden cameras and mics) are Wi-Fi and this instrument can pinpoint them quick. Great instrument and price - Great service, Thanks Banggood.

Just received, delivered right to my door - I love the service. This instrument GM3120 is the Pro quality safety device to measure Electromagnetic Field and has Alarm set points. I have find another application of this instrument: as the "bug finder". All the bug devices (hidden cameras and mics) are Wi-Fi and this instrument can pinpoint them quick. Great instrument and price - Great service, Thanks Banggood.

Just received, delivered right to my door - I love the service. This instrument GM3120 is the Pro quality safety device to measure Electromagnetic Field and has Alarm set points. I have find another application of this instrument: as the "bug finder". All the bug devices (hidden cameras and mics) are Wi-Fi and this instrument can pinpoint them quick. Great instrument and price - Great service, Thanks Banggood.

ElectroMagnetic Radiation Meter. Arrived within a week of ordering!! Fastest delivery from China to US I have ever experienced! Very impressed with delivery speed. The item works as described. It measures electrical and magnetic fields and displays them separately. The measurements can be displayed as peak or average and can be “frozen” with a button press. It will also alarm with either measurement going above a “safe” level. The electronics inside include microprocessor technology with an inductive and a resistive sensor. The main circuit board was assembled well with no obvious defects or cold solder joints. This means that it should be rugged, solid and able to withstand hard use. Overall, a very impressive measurement device at a reasonable cost.

ElectroMagnetic Radiation Meter. Arrived within a week of ordering!! Fastest delivery from China to US I have ever experienced! Very impressed with delivery speed. The item works as described. It measures electrical and magnetic fields and displays them separately. The measurements can be displayed as peak or average and can be “frozen” with a button press. It will also alarm with either measurement going above a “safe” level. The electronics inside include microprocessor technology with an inductive and a resistive sensor. The main circuit board was assembled well with no obvious defects or cold solder joints. This means that it should be rugged, solid and able to withstand hard use. Overall, a very impressive measurement device at a reasonable cost.

ElectroMagnetic Radiation Meter. Arrived within a week of ordering!! Fastest delivery from China to US I have ever experienced! Very impressed with delivery speed. The item works as described. It measures electrical and magnetic fields and displays them separately. The measurements can be displayed as peak or average and can be “frozen” with a button press. It will also alarm with either measurement going above a “safe” level. The electronics inside include microprocessor technology with an inductive and a resistive sensor. The main circuit board was assembled well with no obvious defects or cold solder joints. This means that it should be rugged, solid and able to withstand hard use. Overall, a very impressive measurement device at a reasonable cost.

Its simple to use and it works. Don't know how accurate it is but it can detect electric and magnetic fields. Mine came without battery.

Its simple to use and it works. Don't know how accurate it is but it can detect electric and magnetic fields. Mine came without battery.

Its simple to use and it works. Don't know how accurate it is but it can detect electric and magnetic fields. Mine came without battery.

Thanks and looking forward to visiting your products page again and ordering, delivery was fine and happy with this item, thank you. ... SneakPeeks

Thanks and looking forward to visiting your products page again and ordering, delivery was fine and happy with this item, thank you. ... SneakPeeks

Thanks and looking forward to visiting your products page again and ordering, delivery was fine and happy with this item, thank you. ... SneakPeeks

Top produkt for a nice price. It works beautiful. Fast delivery.

Top produkt for a nice price. It works beautiful. Fast delivery.

Top produkt for a nice price. It works beautiful. Fast delivery.

It works well and fast. Most of the time you will find readings for the E-field. For the H-field I find readings in the neighbourhood of the magnetron. Concerning the E-field I think in a usual houshold most comes from the 50 Hz of the mains.

It works well and fast. Most of the time you will find readings for the E-field. For the H-field I find readings in the neighbourhood of the magnetron. Concerning the E-field I think in a usual houshold most comes from the 50 Hz of the mains.

It works well and fast. Most of the time you will find readings for the E-field. For the H-field I find readings in the neighbourhood of the magnetron. Concerning the E-field I think in a usual houshold most comes from the 50 Hz of the mains.

Very accurate and easy to use and readout English menu, good value for money. A must have electromagnetic radiation detector in your lab!

Very accurate and easy to use and readout English menu, good value for money. A must have electromagnetic radiation detector in your lab!

Very accurate and easy to use and readout English menu, good value for money. A must have electromagnetic radiation detector in your lab!

I am satisfied with the product. One smaal problem with the connectors of the battery 9V I had to insert a piece of carton to force the connexion with the battery. Otherwise the detector does what it promise

I am satisfied with the product. One smaal problem with the connectors of the battery 9V I had to insert a piece of carton to force the connexion with the battery. Otherwise the detector does what it promise

I am satisfied with the product. One smaal problem with the connectors of the battery 9V I had to insert a piece of carton to force the connexion with the battery. Otherwise the detector does what it promise

Works OK, English menu, easy to use

Works OK, English menu, easy to use

Works OK, English menu, easy to use

Checking this unit out, did reveal some radiation sources and high levels that were really a surprise and not expected. It is a good choice, if you are looking for an RF radiation monitor.

Checking this unit out, did reveal some radiation sources and high levels that were really a surprise and not expected. It is a good choice, if you are looking for an RF radiation monitor.

Checking this unit out, did reveal some radiation sources and high levels that were really a surprise and not expected. It is a good choice, if you are looking for an RF radiation monitor.