The Remote Key Fob 3-Button for 2004-2008 Mazda 6 Hatchback Wagon RX-8 is a replacement key fob made by Wholesale-24-7. It is specifically designed for these models and requires programming by a dealer or automotive locksmith. The key fob comes with a battery already installed, and its manufacturer part number is KPU41788. Made in China, this remote entry system kit is a convenient and essential accessory for Mazda owners looking to replace a lost or damaged key fob.