Model: 35W LCD UpDown Key benefits Flexible 0.5 to 30V output with a user adjustable current limit from 0 to 4A, suitable for powering and charging a wide range of devices. LCD readout displays input voltage, output voltage, output current, and output power for precise monitoring during experiments and charging. Builtin input reverse protection prevents damage from accidental reverse connections. Can step up or down the voltage to match your load requirements; compact and easy to integrate into a benchtop setup. Suitable for CC/CV charging applications with clear indication of operating mode and safe current control. What you get and how it works Output range: 0.5 to 30V with current limit adjustable from 0 to 4A. The unit is capable of continuous operation at up to 3A, with up to 4A possible when adequately heat sunk. Input and output monitoring: LCD displays show the input voltage, the output voltage, the output current, and the output power, allowing you to monitor performance at a glance. Protection: Includes input reverse protection so incorrect connections do not burn components. Regulation: Supports step up and step down operation to provide the required output for your load. Easy operation Control buttons: The module features two input/output control buttons. The on/off button switches the output on or off. A second button is used to switch display modes; long pressing changes the display from current to power readouts. Display and switching: The input voltage and output voltage displays can be toggled for quick reference, and the long press allows switching between current and power as needed. Current and voltage setting Current setting (CC): The current limit is set with the CC potentiometer. Rotating clockwise increases the set current. When the load current reaches the set value, the unit enters constant current mode. A red constantcurrent indicator lights to confirm CC operation. Voltage setting (CV): The output voltage is set with the voltage control. The effective voltage is the 'CV' setting, and users should adjust this knob to the desired output voltage. Specifications Input voltage: 5.5 to 30V. Note: 5V input can achieve normal boost operation, but voltage and current readings may be inaccurate; below 4.7V, undervoltage protection engages. Output voltage: 0.5 to 30V. Output current: stable operation at 3A for continuous use; can handle up to 4A with adequate cooling. Use scenarios Scenario 1: Bench testing microcontroller boards and development kits. Set a precise supply voltage within 0.5–30V and limit current to protect sensitive circuitry during testing. Scenario 2: CC/CV charging experiments. Use the CC knob to set the desired charging current and monitor CC/CV transitions via the LCD readout and red CC indicator. Scenario 3: Powering LED projects or other load tests. Adjust voltage and current limits to suit LED arrays or load tests, with clear visibility of input and output conditions for safe operation. Notes The unit is designed for flexible lab use and hobbyist projects requiring reliable, adjustable DC power with monitoring. For extended current operation, ensure proper heat dissipation through suitable cooling. This description preserves the model, functions, controls, and specifications of the original product while presenting the information in clear, customerfriendly English with concise bullets and practical use cases.