The Pioneer CT-WM77R is a wireless Bluetooth receiver that allows you to stream audio from your smartphone, tablet, or other Bluetooth-enabled devices to your home audio system. This compact device plugs into your existing audio hardware using RCA or AUX input jacks, making it easy to add Bluetooth connectivity to your current setup without having to replace your entire system. With its sleek design and intuitive user interface, the CT-WM77R is a flexible and convenient way to enjoy high-quality wireless audio in your home.