If you have any questions about our wireless earbuds, please feel free to contact us and we will get back to you within timely 1.Electrical characteristics1). The maximum output current: 2 a2). The input voltage: 2 v ~ 24 v3). The maximum output voltage: 28 v4). Efficiency: >93%2.Mechanical properties1). product size: 36 mm X17 mm X14 mm3.Method of useThe module of the IN+ and - after 2~24v, IN adjusting the potentiometer can adjust output voltage,output voltage is greater than the input voltage4.Matters needing attention1). The input voltage should not exceed the maximum input voltage2). The peak current output current is no more than TV university If you have any questions about our wireless earbuds, please feel free to contact us and we will get back to you within timely