The CrimeStopper SP-402 is a versatile car alarm and remote start system that offers excellent security and convenience. It features a two-way communication system, allowing you to receive confirmation on your remote control when a command is successfully executed. The system includes a shock sensor that triggers the alarm if any impact is detected. It also has a remote start function, enabling you to start your car remotely and warm it up before getting in. The CrimeStopper SP-402 is compatible with most vehicles and comes with two remote controls. It has a range of up to 3,000 feet and is easy to install.