Features: Output ripple- is small and PI- filter is available; Thicken radiator- fins. LCD can display input/output voltage, output current/output power/output capacity/output time-. CNC- adjustment, accurate and fast-, can boost and lower voltage, output voltage can be adjusted at will from 0.5-30v, limit current 0-4a can be adjusted at will. 1.3. Anti-reverse connection protection- of input end, which will not burn out; Anti-reverse irrigation at the output end, no additional anti-reverse irrigation diode is needed to charge the battery. The module can be set to open/close by default; Multiple software protection- mechanisms are available, and the protectio-n threshold is adjustable.When the working parameters of the module exceed the protection- threshold, the output will be automatically closed. Specifications: Material: ABS Voltage: 5V-30V Power: 35W Size: As Shown Package Includes: 1x ZK-4KX DC-DC Buck- Boost Converter note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.