8-antenna handheld GSM 4G Cell Phone Jammer for Classroom
The practicality of this jammer is impressive. It can jam GSM, 3G, 4G, Wi-Fi and GPS signals at the same time, jamming almost all the frequency bands used by student devices. I especially like its DIP switch design, which allows us to selectively turn off specific frequency bands as needed. For example, during exams, we will jam all frequency bands, and during group discussions, we will only jam social media-related frequency bands to retain the ability to access academic resources.
Portability is another highlight of Cell Phone Jammer for Classroom CJM08PT03. The whole machine is only 800 grams, which is effortless to carry. I often move CJM08PT03 back and forth between different classrooms to use it. The built-in 4700mAh battery supports 1.5 hours of continuous operation, which is just enough to jam a class. If you need to use it for a long time, you can also work while charging, which is very convenient.
Jamming Frequencies
LoJack: 167-175MHz
CDMA or GSM: 851-894 or 925-960MHz
DCS or PCS: 1805-1880 or 1920-1990MHz
Wi-Fi 2.4G: 2400-2500MHz
4G1 LTE: 700-803 or 790-862MHz
GPSL1: 1570-1580MHz
3G: 2110-2170MHz
4G Wimax: 2500-2690 or 2300-2400MHz
GPSL2L3L4L5 :1170-1390MHz
Jamming radius: Up to 40 meters
Power supply: Power plug, car charger or built-in battery
Total output power: 4W
Operating temperature: -10℃ to +50℃
Operating humidity: 5% to 80%
Device size: 132mm*80mm*41mm
Device weight: 800 g
Product package includes:
1 * 8-band jammer
8 * antennas
1 * charger
1 * built-in lithium battery
1 * car charger
(The signal band of the jammer is adjusted according to the customer’s location, and the power plug is also adjusted according to the customer’s location, including countries such as the United States, Canada, Australia, as well as European countries such as Germany and France.)
(The portable jammer is equipped with a car charger)
After using it for a while, I found that the heat dissipation system is well designed. The built-in fan and large heat sink prevent CJM08PT03 from overheating even when it is running continuously in hot weather. The effective interference range of 40 meters is just right for our standard classroom size and will not affect the normal communication needs of adjacent classrooms.
Teachers reported that students’ attention has been significantly improved and class participation has increased significantly. The library director said that since using it in the self-study area, students’ learning focus time has been extended and the frequency of “checking” on social media has been greatly reduced.
Of course, we only use it in specific areas and time periods, and ensure that the emergency communication area remains unobstructed. Students were a little resistant at first, but soon adapted to this “signal restricted area”, and some even said that it helped them regain the feeling of deep learning.
In addition to classrooms, we also use it in examination rooms and lecture halls, and the effect is equally good. The small size of CJM08PT03 of 132×80×41 mm makes it easy to store and set up, and adapts to various usage environments.
If your school or institution is also facing the problem of needing to interfere with signals, this 8-band Cell Phone Jammer for Classroom is highly recommended. It not only has excellent technical parameters, but also has a very satisfactory actual use experience.
The above analysis shows the use of CJM08PT03 in schools or classrooms, which helps teachers and parents prevent students from playing with mobile phones. At the same time, CJM08PT03 is also suitable for other places where interference signals are needed. Other portable jammers as popular as CJM08PT03 include CJM24PT01, CJM16PT02, CJM28PT01, CJM08PT01, etc.
Please Note:
1. These jammers are customized for frequency bands in specific countries. We adjust the frequency band standard of the device interference by default according to the address provided by the customer. (The United States has its own signal band standard, and Europe has its own signal band standard) If you need to interfere with the signal bands in different regions, you can tell us through the official email.
2. Make sure the antenna is connected correctly before using the jammer. Each antenna has its own number, and each antenna hole also has its own number. The number of the antenna and the number of the antenna hole must be the same, so the antenna must be connected correctly!
3. Low output power jammers may not be effective for devices with high output power signals (such as high-power Wi-Fi routers, Bluetooth audio devices). If you need to interfere with the signal of a high-output power signal device, you need to buy a high-output power jammer.
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