Our smart key fob is designed according to the parts and has been professionally installed. It is not an part and does not have a logo. It is equipped with a complete key assembly, including batteries and chips, and is made of materials. It is sturdy, long-lasting, and sensitive response, making it a good replacement for the parts. Compatible with: 2015-2018 for 200, 2019-2021 for 300, 2019-2021 for , 2019-2021 for Charger. Part Number: 68155686AB, 68155686AA, 68394190AA, 68394196AA,FCC ID: M3M-40821302, M3N-40821302, Please check number/FCC ID and product picture with one before purchase. Product parameters: Frequency 433 MHz, 4 buttons (lock, unlock, luggage compartment release, emergency alarm). Colour:Black Material:Plastic Package Contents: 1x Car keys Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.