Can this type of wifi jammer block all frequency bands?

Looking at the frequency band above, it can be judged that the machine is a full-band wifi jammer, which can block all mobile phone signals of 2G, 3G, 4G, and 2.4G WIFI signals. As long as it is in the classroom where the wifi signal jammer is installed, all mobile phones are blocked It is impossible to make and receive calls, send and receive text messages, and surf the Internet. Since the school has installed this device, students are definitely not allowed to destroy it. If it is forcibly destroyed or removed, the school will definitely take corresponding punishment measures, so it is better not to take risks.