BlockPhone 27 is a low-power discreet jammer, designed for indoor use. This entirely adjustable modular system allows for quick installation and is easy to use. Specially designed for indoor applications, it can be installed in any location where effective protection against cellular phones is needed.

BP27 can be equipped with 1 to 4 modules (bands), each module (band) being dedicated to a specific cellular frequency range.

In order to precisely protect the area, BP27 output power can be adjusted by the user. Each module (band) transmission power can be adjusted independently to control the jamming density.

Several BP27's can be installed in the same location in order to create a network of devices and increase the jamming efficiency, approx coverage per unit 10-15 meters. In locations close to cellular base stations, it's possible to use several BP27 devices (one or more) for the strong channels and one or more for the rest.

Options include external directional antennas, reflector and light grey or dark grey housing.