Radar jammers have been in use for a long time as a simple way for divers to avoid paying tickets for over speeding. The device looks and works like an ordinary sped gun with the purpose to interrupt rather than record. There are many things to consider when buying radar jammers for your personal use.Your package should arrive in a discreet box without apparent labels. The box should not be in any way give you away as the gadget is considered illegal. You need to buy the type that is very potable and can be held for long in the hand without tiring.