Part Numbers/FCC ID: 13510253, 13598506, 13594023, HYQ2AB. Frequency: 315MHz. Note: Not a key shell, it is a whole key Proximity Fob Fits: for Cadillac XTS 2015-2019, for Cadillac ATS 2015-2019, for Cadillac CTS 2014-2019 Pros of Our Keyless Remote: With built in chip, sensitive response, 4 buttons car key: remote locking, unlocking, panic, opening trunk. Fast response, wireless remote control. Notice Programming: This remote and door key must be programmed and cut by a qualified locksmith or dealership(consult some different locksmiths before programming to ensure it is successful). NOTE a working key fob was needed in order to add a new key. This remote must be programmed and cut by a qualified locksmith or dealershipNeed to pay extra money for programming or cutting Package for Car Key Fob: 1 x Car Keyless Entry Remote (Battery Included). Size: 7x4cm / 2.76'x1.57'(L*W). Please check the OE number/FCC ID and product picture with the original one before purchase.