This key contains an embedded micro-chip called a transponder. Each transponder has its own unique code--it's the key's 'fingerprint'. When the key is inserted into the ignition and turned, the transponder is energized and broadcasts its unique code to the car's receiver in the dashboard. If the car's receiver recognizes the code, it will allow the car to start. This specific key holds a Philips 46 transponder chip and has a range of compatibilities with multiple Mitsubishi vehicles manufactured between 2004-2008. The transponder is an extended security feature meant to prevent fraudulent ignition access to your automobile. The key blade will need to be cut by a locksmith or automotive professional. Product Features:Replacement Transponder Key for Mitsubishi Vehicles with Philips 46 Transponder ChipContains a transponder chip for enhanced securityKey blade ready for cutting and pairing