However, with the popularity of WIFI, there are some bad effects. For example, hackers can easily steal data from your computer through the WIFI network. Or track your through the smart device's camera. 

This may sound like an alarmist, but this is likely to occur. And it's not uncommon in Europe and North America. This is the reason why we need to use the WIFI jammer. 

Turn on the wifi jammer device, you can completely cut off the wireless signal transmission. Can effectively prevent hackers through the wireless network invasion of your computer or smart device. You don't have to worry about your cyber security and your privacy.