What we have is a modular system. Here's how it works:
Our Powerful Dog Bark Deterrent has a range of about 120 feet, or 160' with
the 10" horn (optional), or 240 - 300' when you add our Boxed 130db transducer.
And it's all plug and play. So you can choose:
1) the basic Deterrent, or
2) the Deterrent with Adapter, and also order the 10" horn, or
3) for maximum power order the Deterrent with Adapter, the 10" horn, AND the Boxed 130db transducer, which plugs into the main unit.
And it's weather resistant and comes with instructions.