Replacement smart car key fob compatible for Acura RDX 2019‑2020, FCC ID: KR5T21, OEM Part Number:72147‑TJB‑A01,72147‑TJB‑A11. This proximity keyless entry remote serves as a great aftermarket car key substitute for worn‑out, broken or lost original factory key fobs. Four‑button smart remote supports lock, unlock, trunk release and panic alarm functions. Press and hold the trunk button to open rear trunk; hold the red panic button to trigger vehicle alarm for car‑locating in crowded parking lots. Built‑in premium circuit board deliver steady signal output for responsive lock, unlock and panic button functions. This smart proximity remote fob is equipped with uncut emergency valet key blade. Important note: professional automotive locksmith or dealership is required for programming and key cutting service, it cannot be self‑programmed at home. Kindly verify your original remote's FCC ID, OEM part number, button layout and vehicle year before placing an order to prevent wrong‑order returns. Solid abs plastic key shell protects against daily drop, scratch and abrasion. Every unit passes strict factory inspection to deliver stable daily‑use performance. This aftermarket key replacement offers a cost‑effective option for drivers needing spare key or backup remote for household family members. Perfect holiday gift & thoughtful present pick for car lovers, dad, husband and auto enthusiasts on birthday, Christmas, Thanksgiving and other special occasions. Practical holiday essential for anyone in need of trustworthy spare vehicle remote.