The Digital RF Chameleon allows making or receiving mobile phone calls while jamming. Using the long experience of designing and manufacturing jamming systems for VIP’s. Digital RF has developed ‘Chameleon’ a Digital Radio System which can be used while jamming. Designated users can use dedicated programmed Radios to call each other and make and receive external calls. Easy to operate Chameleon can be used in fixed environments such as Buildings, Convention Centres or Hotels, or be used in transit where ‘on-the-move’ services are provided.