Mobile phone has become a necessity in our life, on the contrary, the demand for mobile phone signal shielding equipment has also become increasingly. When using the frequency jammer, you can deal with some troubles caused by mobile phones, such as some important signals leaking through mobile phones. When we use a mobile phone to make a call, we use the uplink frequency to contact the base station, and then the signal of the base station is sent to the mobile phone through the operator to realize the call function. When the mobile phone is in standby, the mobile phone still keeps in touch with the base station through the uplink signal. Once there is a call demand, the mobile phone call and information transmission can be realized through the operator at any time. The frequency jammer is a device that interferes by sending the same signal frequency. If the mobile phone shows no signal when using it, the interference is successful. Nowadays, there is only one mobile phone, and it is inevitable that some places will prohibit making calls, sending messages, and surfing the Internet. Frequency jammers have become very useful tools in these places.

Today's frequency jammers can not only interfere with mobile phone signals, but also shield GPS positioning signals. Their functions are becoming more powerful. At present, there are different types of shielding devices sold in the market. Some devices can interfere with the single ended signal frequency, while others can shield multiple signal frequency bands at the same time. The former has a single interference frequency band and more specialized shielding effect, while the latter has more types of interference signals and more complete shielding functions. Shielding equipment that interferes with different frequency bands can be selected according to requirements to ensure maximum equipment efficiency.