9 Volt Power Supply 9v Adapter Replacement for BOSS/ROLAND PSB-1U (Black) 100% Generic New and High Quality Compatible Charger Input Voltage : AC 100-240V (Worldwide AC Input) Output Voltage : DC 9V 2A Center negative Industry Quality : Over Voltage Protection, Over Heat Protection, CE Note: Please make sure the DC output and tip size of ac adapter are accordant before you bid.