A device for protecting vehicles from theft, comes with the device, remote control, and audible alarm, and a complete system for it for sale. The wireless car alarm system shown in the picture is an innovative system characterized by ease and speed of self-installation (DIY). Unlike complex traditional systems, this device does not require cutting or modifying any wires in the car's original wiring harness, which preserves the integrity of the electrical circuit and the car's warranty. [1] The system relies mainly on smart sensors (such as an air pressure sensor and a vibration sensor) and a wireless signal receiver. Here is the detailed guide for the installation steps: [1] 1. Expected basic box contents Siren: The vibration sensor and wireless receiver unit are integrated inside. Remote controls: Smart remote (usually a two-way LCD screen) and an additional remote. Serious buyers, please call.