Frequently Asked questions

Answer: This is only an inllusion. In fact, the mobile phone can not send or receive SMS or calls. If you dial some number, you will find

that the mobie phone indicate no signal.

2. Can the mobile phone jammers block the working of any other electronic devices?

Answer: No. Because the electronagnetic signals sent by the mobile phone jammer only block the mobile phone frequencies. So, only

jam mobile phones. And the jamming signal is relatieve motionless, have no influence on any other electronic devices.

3. Is mobile phone jammer harmful to human health and mobile phones?

Answer: The signals sent by the mobile phone jammer is electronagnetic signals. No devices to exchange data with the electronagnetic

signalss, so never does any transient signals engage. It means that these electronagnetic signals are always in relatieve motionless.Have

no influence on any other electronic devices and is harmless to human being. So it is widely used in any places which mobile phones are

forbidden to use. Like meeting rooms, halls, court, libraries, examination rooms, gas station, military, command centers etc. please rest

assured, the electronagnetic signals sent by mobile phone jammers is weak. The test data indicate that the signal is far from harmful to

human being. At the same time, mobile phone jammers only block the downlink frequency of forward impedance signals, disconect the

mobile phone and the cellular station, So never damage the mobile phone.

4. Are the jamming coverage different from used inside the room and used outside room?

Answer: Yes. The effective jamming coverage is base on use inside the room. In the open filed, the effective jamming coverage can

reaches to several hundred meters. In fact, no matter used inside the room or outside the room, the effective jamming coverage

depending on the environment of the location. For example the distance from the cellular station, the installing positions. So, when use

mobile phone jammers, should fix the mobile phone jammers in probable positions to prevent dead cornor and weak jamming effect.

5. Are the jamming coverage the same when block GSM and CDMA?

Answer: Because CDMA mobile phone is much better at anti-jamming than GSM mobile phone. So the effective jamming coverage of

CDMA is less than GSM mobile phone, but not a big difference. So, in some important places, users should increase the quantity of

mobile phone jammer to jammer CDMA mobile phone signal effectively.

6. After the jammers work for a long time, the shell get hot, is it harmful to the host?

Ansower:Thanks for your remind, this is a normal phenomonon. The engineers designed the metallic shell to help radiate heat to make

the jammers can work continously for a long time. So, even though the shell is hot, it will not damage the jammer.

7. what is the effective jammming coverage of mobile phone jammer?

Answer: The effective jamming coverage is different in different loctions. Because the filed intensity is different in different application

locations. Usually, the jamming coverage given by the factories is only for reference, Accurate effective jamming coverage depend on

the locations.

8.Which kind of mobile phone signal can the mobile phone jammer block?

Answer: Each jammer from our company can block GSM/CDMA/PHS/3G. If customers have special requirements, we can add or

substract some frequency band.

9. Is the jamming signal unstable?

Answer: When mobile phone jammer transmit the jamming signal sent by the mobile phone jammer cross the GSM/CDMA/PHS/3G

(it is the critical distance).Because the GSM/CDMA/PHS/3G signal fluctuate, sometimes is weak. But the transmit power of the mobile

phone jammer is stable. So, the jamming effect is not stable in the critical distance.But when the mobile phone jammer transmit signals,

there will be a safe jamming coverage area. It is suggested that when install the jammers, the jamming coverage should be calculated by

the stable jamming coverage.

10. What¡¯s the difference between directional antennas and omnidirectional antenna?

Answer: Both directional antennas and omnidirectional antenna are disigned on brandboard technology, both can block GSM, CDMA,DCS,

3G. The difference only lies in the angel and distance.