This Handheld Jammer is designed for close-range interference, i.e. 5 – 20m maximum. Nevertheless, the PKI 6530 Pocket – Jammer is interesting for the bus, train, ship, theatre, just in the immediate area where interference should be eliminated. Whether through mobile phones or other surrounding sources. The battery charge is strong enough for 2 hours of operation, which is usually sufficient. In addition, the PKI 6530 Pocket – Jammer is rechargeable in the vehicle. As a handheld jammer, the PKI 6530 Pocket – Jammer can be carried with you at all times and is suitable for any transmission.