The Astatic 302-VS4 External 5 Watt Speaker is a black CB external speaker with an impedance of 8 Ohms. It includes a 10' cord, 3.5mm plug connectivity, and comes with a mounting bracket and hardware. This speaker delivers 5W RMS power and has dimensions of 2-1/8 inches in length, 2-3/8 inches in height, and 3 inches in width. It is designed for radio communication devices and is a reliable option for enhancing sound quality and amplification.