Wireless signal jammers are devices used to disrupt radio signals. The low cost of manufacture of wireless signal jammers and their damaging effects have added to their popularity and frequent use.

Wireless signal jammers are most often used to interfere with wireless local area networks (WLAN), a type of denial of service (DoS) attack. Advanced and more expensive versions are used to jam satellite communications. The Wireless Signal Jammer Device can be used to temporarily stop transmission, temporarily short out or turn off the power during the usage of units. These include Radios, Televisions, Microwaves, or any unit that receives electrical signals for operation.

Jammer Device Method:

Intentional communications jamming is usually aimed at electrical signals to disrupt control of a battle. A transmitter, tuned to the same frequency as the opponents' receiving equipment and with the same type of modulation, can, with enough power, override any signal at the receiver.

The most common types of this form of signal jamming are random noise, random pulse, stepped tones, warbler, random keyed modulated CW, tone, rotary, pulse, spark, recorded sounds, gulls, and sweep-through. These can be divided into two groups – obvious and subtle.