Product Features:
1.Has a good cooling system with heat sink and 2 big on top fans+4 small fans inside, low noise
2.Each frequency band is separate and with adjustable power from Max to OFF(0)
3.Has 100% Safe VSWR over protection for each modular
4.Has ultra-wide jamming bands, able to jamming the vast majority of common frequency band

Precautions:
1.The jammers are customized according to the frequency bands of different countries, please confirm that the purchase country and the actual use country are consistent. Otherwise it can not be used.Please read the jammer function before purchasing.
2.If the low power jammers(such as handheld jammers) to blocker high power signal device(such as high-power WIFI router, Bluetooth audio equipment, etc.), the effect will be poor or even can not jammer.
3.It is forbidden to use while charging.
4.Do not use handheld jammers as desktop jammers.
5.Do not use jammers before connecting the antenna.