Hf-Surveillance transmitter, the so-called bugging devices, are spread in large quantities all over the world. Whether inside the telephone or used as stethoscope for rooms or walls, whetherbattery- or mains-operated, the target is the same everywhere, i.e. receive important information you normally can not get access to. Witk the PKI 6910 Surveillance Jammer VHF / UHF / SHFthis undesirable electronic eavesdropping can be eliminated. Our PKI 6910 Surveillance Jammer VHF / UHF / SHF is made for frequencies that are used for the eavesdropping technique. Due to the fact that the bands of the bugging devices are very narrow (20 – 25kHz), it is extremly difficult to jam their receivers. The PKI 6910 Surveillance Jammer VHF / UHF / SHF jams the receiver in such a way, that the transmitted information can not be heard. The RF Jammer can not disturb the bugging device itself or the information. To reach a wide jamming range of 500 – 1000m, a high output power of 250W is required.