... -proof and shock-proof.Functions:1. Speed lock (automatic car first, manual operation second): If automatic car, when driver in "R" "D ... and stop engine, convenience for car owners get off.3. Distress (eg, collision) unlock: Speed plummeted (within 2 seconds from ... engine stops running immediately;2. The car door central locking will unlock when the speed plummeted (within 2 seconds from 50KM ...