RAK makes sure to use the highest quality components feasible. We carry both OEM and replacement products. Without a doubt, the OE ones are exactly the same as the ones stocked at your local dealership parts department. Our aftermarket replacements for factory remotes are of higher quality than you could find from competitors or on other marketplaces. We use three types of Remote Keyless Signal testers to ensure the products are functioning properly before we send it to you. Some products are checked on specific kinds of testers like smart keys. When products are ordered for vehicles that have onboard programming procedures, the instructions are shipped in the package. Free expert tech support is included with purchases. Batteries are always included with products that use batteries.