Things buyers must know: 1. The equipment must be connected to the correct power source. The acceptable voltage range of this system is 8-20V. If the voltage is too high or too low, the system will not work properly.2. This system is universal and can be installed in almost any 12V car, but it cannot work with the original push button start system of the car itself, or the central door lock with double pulse unlocking, or the pneumatic door lock.3.The models with mobile APP in the picture all have Bluetooth. These models can use the APP to remotely control the car to lock/unlock/open the trunk/start the engine.4. Installing this system requires some profeional automotive electronics knowledge. Please read the product manual carefully. Please pay attention to output signal cables must be connected to the correct signal according to the "+" or "-" on the product manual. Wrong connections may cause short circuits or burnout of the product.5. All products have been strictly inspected before leaving the factory to ensure that they are complete and working properly. If you have any problems after receiving the product, please contact us immediately. We will give you the best solution. Good communication is very neceary , we reject all disputes opened without communication.6. The product manual is not only in English, we also have Ruian, Portuguese, Spanish, etc., You can check the different languages by scanning the QR code in the product manual. Model DQD-LY Features:1. lock/unlock/remote start by remote key or APP.2. Car original remote control remote start.3. Push one button start / stop engine.4. Compatible with car's original anti-theft system.5. Engine lock (can't start the engine with a button after the module is locked).6. Automatically lock door while driving, automatically unlock door when the engine is turned off.7. Remot open back box by key or APP (Requires the car itself to have a controllable circuit).8. Select petrol mode/diesel mode by switch (Warm up at starting).Packing List:1* ignition control module2* Install wiring harne2* Remote keys1* Start stop button1* Product manual Q&A about the product: 1. If I remote start engine it mean my car is unsafe and anyone can drive?This system is very secure, it has a complete anti-theft system, keep lock when remote start, and auto shut down the engine and alarming when trespaing.2. How far is the remote start?The remote control distance is about 60 meters; the APP is controlled by Bluetooth distance is about 20 meters (different mobile phones have different Bluetooth power, some may be 50 meters, some may be 5 meters).3. How to use the app?First, scan the code to download the APP, (choose Android or Apple), then turn on the Bluetooth of your mobile phone, click the APP "learning key", and then pre the "lock" and "unlock" of the remote control at the same time, it is easy to complete. If you want to put the start / stop button in another location, please click the link below to purchase the punch button set How to start and stop? Turn On: step on the brake, pre the start-stop button once, the engine turn on; do not step on the brake, hold down the button for 5 seconds to turn on the engine. If you pre the button forever, the engine will start forever.Turn Off: step on the brake, pre the button once, the engine will turn off; do not step on the brake, hold down the button for 5 seconds to turn off the engine. Matters Needing Attention If your car has an anti-theft chip, and the chip induction coil at the ignition switch cannot be removed, you may need an additional small box to guide the chip signal. If you need to buy a chip avoidance box, please click the image link below