CIU-M8 Multi-Band Indoor Mobile Phone 3G 4G Wi-Fi Jammer is ideal for a conference room, a VIP room. CIU-M8 features wide 8 bands with a nice cover design. Each band is in one module so each module can be replaced with other optional module to meet clients’ requirement. The output power of each band is adjustable by a knob. You can switch off the certain bands to extend longer operation time of the jammer. The built-in high gain patch antennas helps

effective blocking distance up to 20 M

(The jamming distance depends on the local environment conditions.)