Check the listing for details. MS4 Micro Stack Battery Powered Guitar Amplifier. Condition: Open box. Listed at 55.89 USD. #html-body [data-pb-style=B2M7YWO],#html-body [data-pb-style=B5FNDBQ],#html-body [data-pb-style=DH4YPJN],#html-body [data-pb-style=DJ9HRPB],#html-body [data-pb-style=HB3AOMB],#html-body [data-pb-style=MRVGPRB]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}Marshall MS4 Not-So-Mini Mini Guitar Amplifier The Marshall MS4 is not just any mini amp; it’s a 1-watt powerhouse that brings the full-stack experience to your fingertips. This little legend features gain and volume controls, allowing you to dial in that extra distortion for your riffs. Whether you’re practicing in your bedroom or jamming with friends, the MS4 is versatile enough for any situation. Battery powered.