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  • 27/05/2020

    The perfect product, although slightly illegal and in the housing estate, will not make the neighbors happy. But I'm sure there's no point in using this device in a city, or in a block of people. I've tested most of the bands so far. Part of the bands are interfering with harmonic waves either partially or creating a very intense "Sinus Noise." The only problem I'd see is that if it goes through the "DHL" that equip the clearance, the item can be more expensive by about 50% at the price. It is therefore necessary to calculate if the item already enters the customs procedure with considerable charges. Specifically, it was for the price with a shipping cost of about 112€ still less than 50€ per duty. Slightly unpleasant experience. As far as the product is concerned, I certainly have no reservations. It's top-notch processed from solid aluminum. I know also versions with different antenna heights, here the antennas of the same height were chosen because of the design, although their "fill" is often half as far as the band is concerned. What's really worth of praise is the aluminum solid case, active cooling. Unfortunately, very strong radiation, which my measuring devices drove off the scale and I probably wouldn't wear it in my pocket :D. Certainly the strength and harmfulness of the signal decreases exponentially at distance. I've measured the least emissions above the antennas. The strongest propagation is perpendicular to the antennas. In 20cm in all directions the radiation of waves falls to safe levels, in 50cm from the stand is relatively low. I measured off, and the device turned on by a microwave tester (terterer for WiFi power antennas and leaks "from microwave ovens"). The results of the measurements were well out of range. But this result had to be logical, given that the device should work, not just light the LEDs :).. Personally, I evaluate that from a distance of 1m from the device is safe, 2.5m from the device for people with almost no effect. I just really warn you, if a good guy wants to carry this in his pocket, he gets very high doses of microwave radiation in all bands - and that's not very healthy - but perhaps every smarter creature knows that :).

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  • RobVIP3

    It works on GPS, cell phones and 2.4GHz WiFi but it does not affect 5GHz WiFi. I confirmed the function by viewing the specified frequency slots for GPS, cell, Lo Jack and WiFi using an SDR receiver. The N8 Anti Tracker does not transmit in the 5GHz WiFi band. My Verizon LTE phone dropped a conversation as soon as the N8 was turned on. The 173MHz Lo Jack frequency was only slightly affected by turning on the #2 switch. Lo Jack was not affected by any of the other switches. In the manual, "BD" stands for BeiDou, the Chinese GPS system. The switch numbers and antenna numbers coincide. Flipping the 8 DIP switches on determine what is transmitted. Switch and Antenna # 1. 3G PHS ? (I could not determine what frequency was transmitted) 2. CDMA 800: 851-894MHz 2. GSM 900: 925-960MHz 2. LO JACK: 173MHz (weak signal) 3. DCS 1800: 1805-1880MHz 4. WiFi 2.4G/4G: 2400-2500MHz (does not affect 5GHz WiFi) 5. BeiDou Chinese GPS/LTE800: 791-821MHz 6. GPS: 1570-1580MHz 7. 3G1 WCDMA: 2110-2170MHz 8. 4G1 LTE2600: 2620-2690MHz I received the European style 240v converter instead of the US 120v needed but I had a spare 12v 2amp +center adapter so it was no problem. You might want to send them a note to remind them to send the correct adapter. The 12v DC in jack on the N8 is off center but the plug works and charges the unit. Overall I am impressed with the N8 Anti Tracker.

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  • iganev

    The device was delivered in 2 weeks time. Well packaged and in good condition. Seems to work fine so far, haven't tested the range yet, but I think 20 meters won't work, more like 5 to 10.

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  • 21/01/2020

    Frankly a little disappointed with the quality of the product. Home router wifi 2.4GHz and the GPS signal blocks well for around 10 meters radius. But in order to block 2G, 3G and LTE (4G), all switches must be on and not a specific one. Blocking at best for 5 meters radius and still more often allowing the cell phone to work normally with the cellular network (checked with iPhone 5 SE, up to 10 meters away ). Above 5 meters not blocking cellular network at all . The best results when the unit is connected to the power supply and not with the internal battery

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  • 30/07/2019

    muito bom produto

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  • 21/11/2019 realmente funciona

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  • 18/07/2019

    Месяц здал.

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  • 04/06/2020

    Hello The product was arrived on time, but after installation, it works only with a range of 2 till 5 meters and I needed min. 10 meters !! The documentation says 20 meters but never ever it can go so far. And for my yoga lessons I need no interruptions !! Is it possible to change the product with a stronger version ? I will pay the surplus. Thanks

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  • 05/02/2020

    Works! Knocks out TV; the cell phone, the WiFi and the GPS. was in a room where some 20 people were staying. TV was running as well as WiFi for the broadband most of them sat with their phones surfing or similar. I started the N8 and everything stopped working. TV went out straight away and after a little while everyone who used the phone started complaining about no net and that there was no calling or surfing. Turned it off and TV started right away and after a little while everything was working normally with WiFi and the phones found networks

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  • 15/07/2019

    It IS what it says it is. It absolutely does what it says. Range on each band varies. The power output on individual bands is not high. They average 0dBm (1mw). The range of this device can be drastically increased with other bangood products. You just need an RF power amp of the appropriate frequency range, a SMA jumper cable and their log periodic antenna.Only the bands under 1Ghz require different antennas. It's an option! If I built this device, it would cost me $200 in parts.

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