Abstract: An anti-theft device for electronic equipment mounted in a vehicle, such as audio systems, includes a housing for storing electronic component of the audio system and a detachable control panel that can be removed when the operator leaves the vehicle. A replacement detachable panel can be mounted on the housing to enable a locking of the housing to the vehicle dashboard. The second detachable panel can include an alarm, an ultrasonic sensing device, and a self-contained power source so that a security alarm system can be activated by the installation of the second detachable panel as a further deterrent to theft.