?Important?Without this step, you can't use remote start function?Auto Car? When the car in start-up state, put the car gear in”P” or “N” position and pull up hand-brake on, press the start button for 2 , the led inside transmitter will flash slowlyWhen you get off the car, to shut down the engine and lock the car, then remote start function is actived.?Mantal Car?Step on footbrake, long press the third and the fourth button at the same time on remote key for 4s. ? Build-in Lock Security system?After you lock the car, it will emit 5 beeps when it is touched illegally. When start the car and step on the foot brake, the central locking system will be locked, don't worry the kids will open the door when driving. ?One Key Start/Keyless Entry Especially For Upgrading Old cars?Door will unlock when the remote key or mobile phone approch the car 2-5m. Fits for 95% DC12V compact, sedan, coupes, SUVs, pick-ups on the market. For Honda /Nissan /Chevy/Mercedes Benz/Jeep Cherokee more. ?Remote Engine Start/ Pre-warm or Pre-cool your car?Keep the air conditioner on after getting out of the car, use App or remote key to start engine outside the car, the air conditionerthe will turn on automatically. Remote Key start engine sensing distance is 50-150 meters. Difference:?Key with PKE Function ? the key has PKE Passive Keyless Entry function. ? Key without PKE Function?the key don't have PKE Passive Keyless Entry function, but you can keyless entry by phone. The phone replace the key, when the phone near the car, the car unlock .