The LCD Can Display Input/Output Voltage, Output Current/Output Power/Output Capacity/Output Time; It Has A Of Software Protection Mechanisms, And The Protection Threshold Is Adjustable. After The Module Operating Parameters Exceed The Protection Threshold, The Output Is Automatically Turned Off. Numerical Control Adjustment, Accurate And Fast, Can Boost Or The Voltage, The Output Voltage Can Be Adjusted 0.5-30v, And The Current Limit Can Be Adjusted 0-4A; The Input End Is Protected Against Reverse Connection And Will Not Be Burned When Reversed; The Output Ripple Is Small And Has -Type Filtering; The Output End Is Anti-Backflow, And There Is No Need To Add An Additional Anti-Backflow Diode When Charging The Battery; The Module Can Be Set To Be On/Off By Default; The Heat Sink Can Be Thickened. Description: 1. Input voltage: 5.0-30V 2. Output voltage: 0.5-30V 3. Output current: It can work stably at 3A for a long time, and can reach 4A with enhanced heat dissipation. 4. Output power: natural heat dissipation 35W, enhanced heat dissipation 50W 5. Voltage display resolution: 0.01V 6. Current display resolution: 0.001A 7. Conversion efficiency: about 88% 8. Working frequency: 180KHZ 9. Soft start: Yes (modules with power and load may fail when starting) 10. Protection mechanism: Input anti-reverse connection; Output anti-backflow; Input undervoltage protection (4.8-30V adjustable, default 4.8V) Output overvoltage protection (0.5-31V adjustable, default 31V) Output overcurrent protection (0 -4.1A adjustable, default 4.1A) Output over-power protection (0-50W adjustable, default 50W) Over-temperature protection (80-110 adjustable, default 110) Timeout protection (0-100h adjustable, off by default) Over capacity protection (0-60Ah adjustable, off by default) Note: Different Batches May Have Differences In ProductAppearance, Color, And Printed Characters, Which Will Not Affect The Use size: about 79mm x 43mm x 26mm Material: ABS colour: grey Package Contents: 1 x Voltage Regulator Panel Only the above package content, other products are not included. Note: Light reflection 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.