These are 5pcs 6-24V 12V/24V to 5V 3A DC-DC Modules. Input with reverse polarity protection diode, will not damage when input connect incorrect. Ultra-low static current, 0.85 mA only. Do not need to add when connected to the car battery, can be connected to car lighter cable or ACC power supply cable. Features - Color: Red. - Material: PCB. - Size: 2.70X1.60X0.60cm/1.06X0.63X0.24 inch. - These are 5pcs 6-24V 12V/24V to 5V 3A DC-DC Modules. - Non-isolated module ( ) synchronous rectification. - Input with reverse polarity protection diode, will not damage when input connect incorrect. - Ultra-low static current, 0.85 mA only. Do not need to add when connected to the car battery, can be connected to car lighter cable or ACC power supply cable. - Using the latest USB identification circuit, perfectly compatible with most mobile phones. 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