Sound/Flash Alarm: When the car is locked, once it is shaken, the LED light flashes and the horn alarms.Silent Alarm: When the car is locked, once it is shaken, the LED light flashes and the horn does not sound.Remote Control: Equipped with 2 remote controllers, you can remotely control the door opening and closing, which is more convenient to use. If the door is not closed properly, a "DIDIDI" prompt will be issued.Central Locking Automation: After the engine is turned off, the door will be auto unlocked, which is convenient for passengers to get out of the car; 15 seconds after the key is pressed, step the foot brake, the door will be auto locked; if the door is not opened within 25 seconds after unlocking, the system will auto lock.Remotely Open the Trunk: Press and hold the unlock button for 3 seconds, the trunk will automatically open, making it easier for you to take and place items. (It needs to be used with the trunk motor.)Specifications:Material: PlasticsMain Unit Working Voltage: 12V±3VStatic current: 10mALED indicator: 3mAOperating Frequency: 315MHz-433MHzWorking Temperature: -40-80°CPackage Size: 190 * 140 * 83mm/ 7.5 * 5.5 * 3.3inPackage Weight: 700g/ 24.7ozPacking List:1 * Main Control Unit2 * Remote Control1 * LED Connection Wire1 * Engine Relay1 * Shock Sensor1 * Horn1 * Wiring Set1 * User Manual