We need to know what power is this test Cell Phone Blocker Detector because it is divided into 12W, 16W and 18W. The effective range for different power generation is different. If it is only a small power, it is generally aimed at open spaces. It can be used in a small area, just the size of a classroom. However, if you want it to pass through a wall, there will be no shielding effect after actually passing through the wall. Therefore, if you choose a low-power cell phone jammer, try not to go through the wall. Each teacher is equipped with one machine. If high power is selected, one machine can satisfy several classrooms. In general, there are still many questions about the purchase of mobile phone signal jammers. We are a manufacturer with first-class technical support team and years of experience in research and development of cell phone signal jammers. We have received a lot of cooperation. Highly rated by customers, it eliminates electronic cheating in the examination room and is trustworthy.
Because the working principle of the school's mobile phone jammer is to shield the mobile phone by interfering with the mobile phone jammer in the designated frequency band, as long as the receiving and transmitting frequency of the mobile phone can be modified to prevent being blocked, the mobile phone jammer can only block the mobile phone signal of 900-1800MHZ. The sending and receiving frequency of the mobile phone is 850-1900MHZ, which is much larger than the shielding range of Cell Phone Blocker Detector, so as long as the sending and receiving frequency of the mobile phone is adjusted to the maximum in the mobile phone settings, the mobile phone can receive signals normally. This method has relatively high requirements on the mobile phone and the environment, but the effect is the best and the most hidden. The premise is that the mobile phone must have wifi wireless Internet access, and there must be an available wireless network around (almost impossible in our first high). After searching for and successfully connecting to an available wireless network with your mobile phone, you can still surf the Internet without data even if the mobile phone has no signal.
