Product description :
This jammer is specially for prisons and other large sensitive locations such as military or governmental compounds. This high power system has been approved and installed by Prison Authorities in very large prison facilities in several Countries world wide.
With waterproof performance and 80-350W high output power, the device shows the good nature in many aspects. The shielding radius is up to 120-500 meters which is more than 10 times to the common device. 
Used in the prison, it can greatly reduce the possibility of break prison. What's more, it has metal enclosure which prevents sabotage. With the integrated incoming air filter, it makes sure the device cooling system operation normally.
It can effectively shield (interference) in the radius of 100-200 meters all indoor and outdoor signals such as 2G / 3G / 4G mobile phone signal and intercom, remote bomb, WiFi signal, shielding eraser, SMS pen,stealth headphones, watches cheating, glasses probe wireless signal, to prevent candidates cheat, protect the venue quiet, and to prevent bomb attacks.

Advantages:
• Aluminum-alloy casing with high protection has high resistance to dust, water and corroding.
• Heat sink designing combing with the fans to make system in a cooling status.
• Special technology to prevent interference between each frequency band.
• Only interfere downlink frequency of mobile system, without disturb normally working of Base Stations.
• Frequency bands and output power selectable.
• Each frequency band controlled by independent RF ON/OFF switches.
• Power of each frequency band can be adjustable independently.
• Circuit protection to ensure system will not burn out in case of antenna short circuiting or disconnection.
• Antenna type options, directional or Omni-directional antennas option.
• Easy operation and installation.
• Keep for upgrade module installation. 
• Working 24 hours / 365days continuously.

We could supply customized service by your detail requirements about frequencies setting. All 6 Frequency modules we can mix very flexibly.