Scytek Astra 777 2-Way Paging Car Alarm Vehicle Security System with LCD remote Transmitter One Carbon Fiber 2-Way 5 Button LCD remote control with Vibration Mode and One Standard 4-Button Remote Built-In Parking-Light Relay Plug-in user programmable Coded Override Switch Plug-in Dual-Zone Dual Adjust Piezo Sensor Remote Door Locking/Unlocking negative outputs; Passenger Unlock Output Combines security with remote start One 5-button code-hopping transmitter Plug-in dual zone piezo sensor Built-in parking light relay 2 auxiliary channels