Part Numbers/FCC ID: BGBX1T478SKE125-01 Frequency: 315MHz. Note: Not a key shell, it is a whole key. Proximity Fob Fits for Mazda 3 / Speed 3 2010-2013, for Mazda MX-5 Miata 2006-2015, for Mazda 6 2009-2013 Pros of Our Keyless Remote: With built in chip, sensitive response, 4 buttons car key: remote locking, unlocking, panic, trunk hold. 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 is included). Size:6.6x3.3cm / 2.60'x1.30'(L*W). Please check OE number/FCC ID and product picture with original one before purchase.