Shock-resistant and rugged construction makes this extension speaker great addition to your SUV or commercial truck. Plus it comes in cool vintage chrome. Compared to the radio internal speaker good external speaker improves both the tone and volume of what you hear and this speaker by Wilson has both crystal clear sound with superior audio quality. Constructed of 22-gauge steel housing this speaker includes heavy-duty matching black mounting bracket and 10- foot audio cable with 3.5mm plug and 10-watts of continuous power with 20-watts of maximum power. High performance and durable design. Your CB radio comes with built-in speaker but when you add this extension speaker you will immediately notice difference in audio quality. Dimensions (WxHxD): 5.125 inches 5.25 inches 3.25 inches.