Antitheft device for informing vehicle's speed, has walkman presenting lead wire provided with plug, where walkman transmits zero to nine numbers to screen of car radio by intermediate of plug

摘要

The device has a MPEG-1 Audio Layer 3 (MP3) walkman (1) presenting a lead wire (2) provided with a universal serial bus (USB) plug (3). The walkman is installed with framed zero to nine numbers, and automatically transmits the numbers to a screen of a car radio, by intermediate of the plug. The screen displays the numbers, which are operated as a security code.