The BMW 1 5 Series F20 F21 F10 F11 Clariton low tone pitch horn siren is a high-quality accessory designed specifically for BMW vehicles. Manufactured by Clariton, this horn siren with the manufacturer part number 70/3881157 produces a clear and distinctive sound to alert other drivers. Made by a trusted brand like BMW, this product ensures durability and reliability for your vehicle's exterior parts and accessories. Upgrade your car's sound system with this top-notch horn siren for enhanced safety and style on the road.