Parameters: non-isolated buck USB charger module (BUCK) synchronous rectification; Input voltage: DC 6 - 24V; Output voltage: 5.1 - 5.2V; Output current: 3A MAX (please enhance heat dissipation when using at full load), the actual test result input 12V output current 2A and does not need to enhance heat dissipation Wide application: with reverse polarity protection diode, it will not be broken when the input is connected incorrectly, ultra-low static current, only 0.85 mA; No need to add switch when it is connected to the car battery, and can be connected to car lighter cable or ACC power supply cable Protection: output overvoltage protection: input 1.5A fuse, output 5V with 300W tube clamp protection; There is input reverse polarity protection : Conversion efficiency: can up to 97.5% (6.5V to 5V 0.7A) (after short reverse protection and fuses test data) Switch frequency: 500KHz Output indicator: output voltage indicator is red Operating temperature: industrial grade (-40Celsius to + 85Celsius) (the higher the ambient temperature, the lower the output power) Output overvoltage protection: input 1.5A fuse, output 5V with 300W tube clamp protection Full load temperature: 30 Celsius Static current: 0.85 mA Load regulation: 1% Voltage regulation: 0.5% Dynamic response speed: 5% 200uS Input reverse polarity protection: reverse polarity protection diode Connection mode: welding Input mode: welding Output mode: USB Colour:Red Material:ABS Size:2.64x1.5x0.74cm Package Contents: 20 x DC-DC buck voltage regulator modules Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.