Sharper Image Tailgate Amplifier Bluetooth Speaker for Guitars & Microphones, Portable & Rechargeable (Black) Portable and rechargeable, the Tailgate Speaker and Amplifier by Sharper Image is a versatile fit for a wide variety of audio needs. Completely wireless - Pair it to a Bluetooth-enabled device to hear powerful, rich, and clear audio on-the-go. Want to make your own music? Connect an electric guitar or a microphone into the jacks and the unit doubles as an amplifier. Built-in volume and echo controls on top of unit. The retractable handle, side handle, and rear wheels make the lightweight Tailgate Speaker and Amplifier easy to lift, carry, and transport from place to place. Speaker lasts for hours of playback. Aux-in port for wired use (auxiliary cable included). Lightweight unit with slim profile.