The Undercover II gives you a little more from your hidden speaker system. Custom Autosound has developed the Undercover II with an 8" woofer and 2 Piezo tweeters in each unit. The Undercover II can be mounted anywhere it will fit, on walls or under seats. These units are a great addition to your Custom Autosound radio adding 200 watts of sound each. Each unit measures 3" H x 11" W x 12 1/2" D. Sold in pairs only.