Signal Jammers. ( rfid relay, relay device)

A professional device for disrupting Wi-Fi, Bluetooth, and GSM transmitters within a 15 m radius. It is intended for usage in environments where cell phones and other mobile devices are restricted, such as conference rooms, government institutions, military bases, and universities. Selcom security's SEL SP-165 "BLOCKADE-5" system is a signal blocker designed to block signals transmitted by cellular phones, GSM eavesdroppers, and a variety of Wi-Fi and Bluetooth transmitters. Signal blockers build a barrier at a given frequency, suppressing undesired transmissions within a 15-meter radius. It is an excellent approach to protect information at an enterprise and other places where the use and bringing of mobile devices is restricted or illegal.