Before purchasing a signal jammer for sale, you should fully consider the following key factors:
1) Band frequency.
The right choice depends on the equipment to be shielded. To avoid cell phone reception, we need to use signal jammers to block cellular signals, so GSM, 2G, 3G and 4GLTE are used in new smartphones. If you don't know the frequency your phone transmits, the only thing you have to do is to find its technical specifications on the Internet or elsewhere. Otherwise, you can also purchase a frequency meter anytime, anywhere, which will indicate the corresponding transmission frequency.
2) Scope of influence.
The effective shielding of the meridional range is the influence distance. The specific impact distance will vary based on reception sensitivity and application location, as well as battery charge status.
3) Refrigeration system of machinery and equipment.
Do not use the shield while the battery is charging or it will burn out the shield as it has a built-in fan which may destroy the shield. In addition, the potential overheating of the shield will not only harm its internal components, but also cause its performance to decrease.
signal jammer
More and more 4g jammers have been created in order to better block the 4G signals on the market, and now they are welcomed by people who need to disconnect the 4G signal to get a friendly environment. And this 5-wire antenna hand-held 3G4G full-range cell phone jammer is one of the best 4G mobile phone jammers, which can block 4G (LTE) and 4G (Wimax) data signals. This type of jammer has several advantages.
First of all, it can not only block 5GLTE and 4GWimax signals, but also CDMA, GSM, DCS, and 5G signals. This is also the ultimate and most powerful shielding device at this stage.
Secondly, you can select the frequency bands you want to avoid. If you don't want to block one or two frequency bands, you can turn them off and leave the other bands on. At the same time, mobile phone jammers can still affect signals in other frequency bands.