EMF Detector, Detect All 3 Types of Electromagnetic Radiation Field in 1 EMF Meter for Cell Towers, and Smart Meters, EMF Reader for Home, Office (RD630W)

Functions well and easy to read. Good value for personal use Battery wore out relatively quick, but it was put through rigorous testing of various homes. Like the 3 color, bright display. We used on all the appliances and electronics to determine dangerous frequencies and the range to which they extend.

As advertised

Versatile detector and seemed to be very sensitive to RF emissions

Works great

This worked great to find the "hot spots" around the house. It even detected a hot spot around electric meter. I will buy a second unit to share with family.

This product is great – the best feature is that you can disable the piezoelectric speaker (annoying beeping) by holding the power/mute button for 1-2 seconds. Holding it again actually turns the backlit screen off, and then doing it a 3rd and 4th time will restore the sound and power respectively. This persists even after turning the device off, so you can have a quiet device without excessive beeps if you so desire.What I received was the RD630C (presumably C=Color) rather than the RD630 as the Amazon-listed model refers to, though the current pictures do accurately show the model number of the product that you get. This model uses a 9V battery similar to the RD630W, not the USB-C (?) rechargable feature you appear to get with the RD637. This isn't mentioned explicitly in the description of the models, which currently only says "1 Lithium Polymer batteries required. (included)". The RD630W description does mention in its description that you get a 9V battery with it... you also get one inside the box with the RD630C in case there was any confusion.Overall, the backlit color changing is neat and makes this intuitive to use. It's excellent that you can disable the speaker and that it saves that setting after you turn off the device ... just make sure you press it instead of holding it when you turn it off, or it will just be disabling the backlight by changing modes and still be On and you may not realize it in low-light conditions.

Excelente equipo de medición de radio frecuencias, campo magnético y campo electrico

I figured for 25 bucks I didn't have much to lose so I rolled the dice. I have a $200 Cornett meter which is very accurate (I've tested against similarly priced TriField and Safe and Sound meters). This meter is just totally hit and miss. It's weird, because SOMETIMES it registers the correct amount of RF (more or less), but then other times it just shows 0 when there's DEFINITELY a lot of RF. It seems like if there's a VERY HIGH amount of RF, it will register, and then if you back away it seems to slowly drop down more or less accurately. But if you start from a lower amount (let's say 3mW/m2 - which, by the way, is still PLENTY to cause health issues), it will frequently just not register anything at all. It almost feels like, if you can imagine this, a sensor that's "sticky" - like, it takes a bit to "move the bar", but then in will "get stuck". I guess this is just what you'd expect from cheap electronics/sensors. It's a shame, because I like the interface idea with the color changing, but the problem is, it just doesn't work. Worse still, it will undoubtedly give people a false sense of safety because it doesn't register RF that is most definitely effecting them. So you can hold it up and say "see, this room's all clear" when it's NOWHERE CLOSE. So yeah, if you want to hold it RIGHT NEXT to your WAP, or your phone that's currently on an active call, it will show RF - but DUH - of course we know there's RF coming from these devices. The problem is thinking that lower amounts of RF just don't exist because this meter doesn't show it. So as a "fun gadget", I guess this is sort of functional - sort of. But if you're really looking for a device to show you what's ACTUALLY going on with the EMF in your environment, forget it - absolutely worthless. I'd like my 25 bucks back but it's not worth the trouble. Lesson learned. You get what you pay for.***UPDATE*** - The vendor has contacted me and not only offered a refund, but also an upgraded model, which I'm told has better accuracy. One I receive the new model, assuming the accuracy is in fact better, I will update this review again. Definitely please with the vendor's excellent service!