You're bidding on a remanufactured OEM BMW smart key with new aftermarket case installed,the frequency is 434Mhz.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,as not all of them can do it.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.
If you plan to take it to the BMW dealership or program it yourself with the self-programming instruction,it's not gonna work,please don't waste your time to buy & return.