As the name suggests, it means shielding wireless signals. The English name of the jammer is JAMMER, which is usually called signal counter equipment and signal sealing control system in China.

Signal suppressor, signal blocker, signal masker, signal blocker, signal driver, etc. are called differently in each place, and the jammer is called according to function or

The use is divided into radio frequency signal jammer, mobile phone signal jammer, GPS Jammer, wifi signal jammer, UHF/VHF explosion-proof jammer, recording

Jammers, test room jammers, vehicle jammers and other wireless signal shielding categories.

main indicators:

Product model: JW-N8G 8-way handheld signal jammer

Shielding signal: full-frequency mobile phone signal 4G/3G/2G +WiFi2.4G/5.8G or GPS/Beidou navigation

Transmitting power: 0.7W per segment, total output power 5.6W (excluding antenna gain)

Shielding distance: 2-20 meters (subject to changes in signal strength or use environment)

Shielding angle: horizontal 360 º (the installation height is about 2 meters)

Indication function: charge and discharge, LED light indication of the working status of each channel

Battery life: Built-in large-capacity lithium battery works continuously for 1.5 hours, standby for 180 days, and fully charged for about 4 hours

Product size: 163x85x47 mm (excluding antenna length)

Host weight: about 0.5kg

Operating environment: -40°C/60°C

Packing details: jammer host x1, omnidirectional antenna x8, charger x1, DC12V car charging cable x1, nylon protective case x1

How to test the local signal strength before choosing a mobile phone jammer?

The interference effect of the signal jammer depends on the signal strength of the use environment. The shielding distance indicated by the manufacturer is usually based on the signal strength of -75dbm, so what type of jammer to choose, you need to know the local signal strength, otherwise there will be no effect or Not ideal situation. The stepped signal icon is just an icon displayed on the front end of the mobile phone system, and it deals with the "dBm" value. Chinese means milliwatt decibels, which is a unit of signal strength commonly used by mobile phones. dBm is calculated by logarithm, so the displayed dBm is negative.

Generally speaking, if the dBm value displayed by the mobile phone is between -80 and -50, then the signal is good, and you can talk and surf the Internet normally. If the value is below -90dbm, it is relatively low, and there may be a phenomenon of dropped calls during calls; if it is -100, it is recommended to turn on the airplane mode when sleeping at night, otherwise the power consumption and radiation will be large! Most Android phones can check the signal strength of the phone through [Settings]-[About Phone]-[Status]-SIM Card Information. How to check the iPhone?

Let's take the iPhone XS as an example. The user can enter the code "*3001#12345#*" in the dial interface, then click the dial button, and click the "Serving Cell Meas" interface in the opened interface to view "rsrp0" and "rsrp1" signal strength value of main card and secondary card.