Patent ID: 7420460

Claim:
Vehicle security system comprising: a security controller electrically connected to at least one sensor and at least one alarm device respectively, the security controller being settable between an alert mode and a non-alert mode, the security controller including a memory storing an anti-thief alert grade table, the anti-thief alert grade table recording at least three alert grades, the alert grades each including at least one respective sensitivity default value corresponding to the at least one sensor, the at least one respective sensitivity default value defining the critical actuation value of the corresponding at least one sensor under the respective alert grade; and a remote controller including at least one control button for selecting one of the alert grades, and remotely driving the security controller to enter the selected alert grade of the alert modes, wherein the at least three alert grades include a first alert grade, a second alert grade, and a third alert grade, the sensitivity default value of the first alert grade being greater than the sensitivity default value of the second alert grade, and the sensitivity default value of the second alert grade being greater than the sensitivity default value of the third alert grade, and wherein the at least one sensor is selected from a group of a vibration sensor, a pressure sensor and a tilt sensor.