The Amazon Echo Dot 3rd Generation Model Number c78mp8 is a smart speaker in the shape of a sphere, designed with a sleek black color. It is compatible with Amazon devices and can be easily integrated with Alexa for smart home functions. With a subwoofer included, this smart speaker delivers 15W RMS power for high-quality sound. Featuring Bluetooth and Wi-Fi connectivity, it also offers voice search capabilities for added convenience. This model, manufactured in 2018, is a versatile and powerful addition to any home setup.