0 %, 25 Watt - Power: 110/220V, Switchable - Maximum USB/SD Card Support: 16GB - Digital Audio File Support: MP3, WMA - PA Speaker Rechargeable Battery: 4.5A Lead Acid, 12V - Battery Operated Mics: Require (2) x 'AA' Batteries (Each) Not Included - Dimensions (L x W x H): 13.H.