The product is a set of two keyless entry fob replacement key blades for Nissan 4b RS vehicles, specifically designed for the KR5TXN7 model. Manufactured by Extra-Partss, these black key blades feature remote start and engine immobilization capabilities. These key blades are essential components for a vehicle's remote entry system, providing convenience and security for the user. Perfect for those in need of replacing their existing key fobs or for anyone looking to improve their vehicle's security features.