Feature: 1. The LCD can display voltage input and output, output current, output power, output capacity, and output time. 2. Numerical control adjustment is accurate and fast, can increase and decrease voltage, output voltage can be adjusted arbitrarily from 0.5‑30V, and limit current can be adjusted arbitrarily from 0‑4A. 3. The input terminal is protected against reverse connection, and the reverse connection will not burn. 4. The output terminal is anti‑backflow, and there is no need to add an anti‑backflow diode when charging the battery. 5. The module can be set to turn on/off by default, with low output ripple and π‑type filtering. 6. After the module's working parameters exceed the protection threshold, the output will be automatically turned off, the heat sink is thickened, and the heat dissipation effect is good Specification: Item Type: Boost Power Supply Module Model: ZK-4KX Main Material: ABS+Aluminum Input Voltage: 5.5-30V Output Voltage: 0.5-30V Output Current: Can work stably at 3A for a long time, and can get 4A with enhanced heat dissipation Output Power: Natural heat dissipation 35W, enhanced heat dissipation 50W Voltage Display Resolution: 0.01V Current Display Resolution: 0.0-0.4A Conversion Efficiency: About 88% Soft Start: Yes (it may fail when the module with high power load is started) 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, closed by default Over-capacity Protection: 0 -60Ah adjustable, closed by default Working Frequency: 180KHZ LWH: Approx. 79 x 43 x 26mm / 3.1 x 1.7 x 1in Panel Cut-Out Size: Approx. 71 x 39mm / 2.8 x 1.5in . Package List: 1 x Boost Power Supply Module