Car alarm system for DC12V with APP Bluetooth control1、3 Ways to Start Car Engine Outside the Car: You can use the app, the original key and the remote control key to start the engine outside the car, Prewarm or precool your car in cold winter or hot summer. 2、Advantage: Using engine remote start system to lock and start your car, providing visual and audible confirmation after you successfully send the command. 3、Smart Security Sensor: In the event of an intrusion, the remote control attached to the system will remind you of what is happening in the car, safe to use. 4、Sensing Distance: The sensing distance of the remote control key to start the engine is 50‑150m/54.7‑164yd, and the engine start sensing distance of the mobile phone depends on the Bluetooth connection distance. 5、More Functions: The car alarm security system has functions such as remote start, keyless entry, car locator, convenient for you to find your car in parking lot. 6、Universal Fit: This keyless entry system is suitable for 95% DC12V compact, sedan, coupe, SUV, pickup truck with on the market, replacement for Nissan, replacement for Chevy, replacement for Jeep Cherokee.