Car alarm 1.Ask for help,Anti-hijack 2.Trunk release.Mute locating 3.Remote memory automatically 4.Shockproof car alarms ,car horns,car electric sirensFeatures:1.Ask for help and anti-hijack2.Trunk release3.Acousto-optic /mute locating the car4.Remote memory/clearly automatically5.Dustproof, shockproof, and static electricity-proof6.Remote adjusting vibration sensitivity7.Central door locking ...