This step-down ( ) power supply module converts its input voltage of 6V to 24V to a fixed 5V USB output at up to 3A output current. It is suitable for providing a regulated 5V USB output to charge your mobile phone, tablet or any other USB-powered device. Features - Color: Red. - Material: PCB. - Size: 2.70X1.60X0.60cm/1.06X0.63X0.24 inch. - Flat copper inductor, improves conversion efficiency. - Input reverse polarity protection, will not damage when input connect incorrect. - The max output current 3A, long time use 2.1A, enough use. - Support protection: input overvoltage, undervoltage protection, input overcurrent, output overcurrent and short circuit,machine overtemperature. - Support multiple fast charging protocols: Solar panel to mobile phone charging, car charging retrofit, driving recorder power supply, home power conversion,smart plug modification, fast charge adapter. Specification - Switch frequency: 500KHz. - Output ripple: 10mV. - Output indicator: Output voltage indicator is red - Operating temperature: Industrial grade (-40 degree centigrade to 85 degree centigrade) (the higher the ambient temperature, the lower the output power) - Output overvoltage protection: Input 1.5A, output 5V, with 300W TVS tube clamp protection. - Full load temperature: 30 degree centigrade. - Static current: 0.85 mA - Load regulation: ±1% - Voltage Regulation: ±0.5% - speeds: 5% 200uS Package list: 5 x USB DC-DC Modules