["brand new and high quality\nFeatures:\nMade of high quality material, solid, durable and strong conductivity.\nLarge LCD can display input/output voltage, output current/output power/output capacity/output for time, easy to read.\nCNC adjustment is very accurate and fast, and it also can boost and step down voltage. Output voltage can be adjusted from 0.5-30v, while limited current can be adjusted 0-4A as you desired.\nIt features anti-reverse connection for protection of input end, which will not burn out, safe to use.\nAnti-reverse irrigation at the output end, no additional anti-reverse irrigation diode is needed to charge the battery;\nThe module can be set to open/close by default, easy to use.\nIt has multiple software for protection mechanisms are available, and the for protection threshold is adjustable.When the working parameters of the module exceed the for protection threshold, the output will be automatically closed.\nOutput ripple is small and PI filter is available.\nThicken radiator fins helps the module to dissipate heat quickly, long service life.\n\nSpecification:\nModel: ZK-4KX\nMaterial: Fiber glass board, Electronic component\nSize: 7.9 x 4.3 x 2.6cm/3.11 x 1.69 x 1.02in\nColor: As picture shown\nQuantity: 1 Pc\n\nProduct Parameters:\nInput Voltage: 5.0-30v\nOutput Voltage: 0.5-30v\nOutput Current: It can work stably at 3A for a long for time, and can reach 4A under enhanced heat dissipation.\nOutput Power: Natural heat dissipation 35W; Strengthen heat dissipation 50W\nVoltage Display resolution: 0.01V\nCurrent Display resolution: 0.001A\nConversion Efficiency: about 88%\nSoft Start: Yes (The soft start may fail when it starts with high power and load module.)\n\nfor Protection Mechanism:\nInput Anti-reverse Connection;\nOutput Anti-reverse Irrigation;\nInput Undervoltage for Protection (4.8-30V adjustable, default 4.8V)\nOutput Overvoltage for Protection (0.5-31V adjustable, default 31V)\nOutput Overcurrent for Protection 0-4.1A (adjustable, default 4.1A)\nOverpower for Protection (0-50W adjustable, default 50W)\nOvertemperature for Protection (80-110℃ adjustable, default 110℃)\nTimeout for Protection (0-100h adjustable, OFF by default)\nSuper Capacity for Protection (0-60AH adjustable, OFF by default)\nOperating Frequency: 180KHZ\n\nNote:\nNo retail package.\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage includes: \n1 x DC-DC for Buck Boost Converter"]