We're launching another revolutionary product today: The BOB Storm Power Supply and Charger, a product designed for Bob speakers, which will offer the best experiences for those passionate about sound. What sets it apart: Eliminates the need for a battery. Maintains up to 3000 WRMS of sound playing. Can be used as a battery charger. Features Smart Coller function, which reduces noise when listening to sound at lower volumes. Technical Specifications: Maintains up to 3000W RMS of Sound Playing without Battery Assistance Automatic Dual Voltage: 110/220Vac Dual Voltage Power Input: 90 to 140Vac / 170 to 240Vac Selectable Output Voltage: 12V / 13V / 14V / 15V Intelligent Charging System: 13.8 / 14.4 cyclic Output Current: 200 Amperes Voltmeter / Ammeter Accuracy: 99% / 96% LED Battery Level and Full Charge Indicators Protections: Overload, Output Short, and Temperature Smart Cooler - Intelligent Ventilation System Control: PWM Dynamic Topology: Half Bridge Weight: 2.00 Kg Approximate Dimensions (LxHxW): 31.7x17.2x9.5cm"