KOL CB4 is a unique cigar box system, specially designed to protect confidential internal conversations from cell phone recording and eavesdropping. This innovative solution neutralizes the microphones of up to 4 mobile phones placed inside the box, by generating an ultrasonic sound which blocks any possability of recording the conversation inside the room by one of the participants as well as cellular interception by outside parties.

If a call is received while the phone is inside the box, it will ring, but it will not be possible to answer it until the phone is out of the box.

The system blocks the microphones of any type
of phones.