Dear customer, This is YN MageTech 2 way car alarm system SC201M9 with 1.73” LCD pager display, remote engine start & stop, timer engine start and shock sensor warning. The item fits for 95% DC12V petrol vehicles on the market. If your car is diesel car with engine starting time over 3 seconds, you can turn on ON dashboard first to pre-warm the spark plug then start the car or add an extra timer delay switch. Important note before purchasing: AAA battery is not included. We do not provide installation service. Professional car alarm installer installation is required. English user manual & wiring diagram is available for reviewing upon request. About Remote working distance note: Remote control working distance is appr. 800 meters/2500ft in wild space, but which may shorter when use by actual buildings, similar alarms interference etc. Please note.