Specially designed external speaker for times when you need more volume that the internal speaker will provide, the LoudMouth is a lot of sound in a small package. Designed for the Double Trouble Calling System and other audio devices that use a 3.5mm audio port. It is a horn speaker, 15 watts, distortion ratio 1.4hz and at 4 1/4" x 3 7/8" x 3 1/8" is very portable and comes with a specially designed attachment strap that allows it to be attached to the side of the Double Trouble to get the speaker up off the ground to improve sound quality and distance. Same brown color to match Double Trouble, comes with 8' of cable.