This Elk Products Echo Siren ELK-71 is the perfect addition to your home security system. It is self-contained and designed for interior use, providing a loud and effective warning to deter potential intruders. The siren is compatible with other Elk Products and can be easily integrated into your existing setup. With its sleek design and high-quality construction, this security siren is an excellent choice for anyone looking to enhance their home security. Whether you are looking to protect your family or your valuables, this Elk Products Echo Siren ELK-71 is a powerful and reliable option.