You're bidding on a used & unlocked OEM BMW smart key,it has been tested and shown in good working order,the housing shows some wear & tear but no cracks,the frequency is 315Mhz,the case was opened and glued back together for the unlocking procedure,you can see the gap between the cases.Please be noted,the BMW dealers won't reprogram this remote for you,it can be only programmed by some professional locksmiths,please check with them before buying.This remote is NOT self-programmable,it won't work,the self-programming video that you saw on youtube only is only good for the brand new one you order directly from the BMW dealership.