Frequency: 433Mhz Chip: ID46 Chip Material: ABS+Matel Color: Black Button: 3 Buttons What is Included: Complete key fob with electronics Programming: - This remote must be programmed by an automotive or dealership.there is no way to program yourself. Fitment For:(The compatibility is just for reference, please compare the follows with your original one before purchasing!) - Fit for Mercedes-Benz Smart / Smart 451 2007-2013 Feature: - Replacement fits for Benz cars. - Include key. - With chip. - Perfect Remote Car key replacement,have a variety of functions you need. - 100% Complete with electronics, transponder chip and battery. - Please compare carefully before placing order. - This remote key must be cut and programmed in order to start the engine - It is convenient for you. - With 3 buttons. - Dealer or Locksmith to cut the key blade and program the remote to your vehicle. Note: - Compatibility: Please make sure that your vehicle is on the above compatibility guide. If your vehicle is not on the guide this remote will not work for you. And make sure the button is same with your original remote.This remote will not start your car, if it isn't same. - Fit for easy transportation, remove the battery delivery. - You need to put a CR2032 battery. - How to Program: dealer/locksmith programming will be required. - No Instructions Included.Professional Installation Is Highly Recommended. - If the key has been used properly, it is not recommended to update it. Package Include: 1x Remote Key (no battery)