This 12 V car alarm system has 7 level sensitivity for you to adjust, after installing it, you can better protect your car. You do not need to cutting wires to install it. Come and have a try, it will not let you down.Car Search Function: You can press the "mute" or "bell" button and the sounds 30 seconds and you can press any button to stop.A full Accessory Set: This alarm set includes a complete set of tools required for.You can press the learning code switch on the main unit inside, and press any button on the remote, the alarm will sound once, indicating that the learning code is successful, and the second remote learn code as first one.Wide Applications: This alarm set can be installed to most 12 V direct current car and has a wide applications.Specifications:Material: plasticsWorking voltage: direct current 12 V±3VStatic current:10 mAWorking frequency: 433.92MHzBattery: 2 * CR2016 (included)Package size: 128 * 96 * 83mm / 5.0 * 3.8 * 3.3inPackage weight: 400g / 0.9lbPacking list:1 * Main Control Unit2 * Remote Controls1 * User Manual