ThisDC-DC converter module is a buck (step-down) converter combined with a boost(step-up) converter, of which output voltage can be lower or higher than theinput. It features small size, high power, high efficiency and stableperformance. It will maintain the stability of output voltage when inputvoltage is higher, lower than output voltage. Features:1. This boost/buck module can step up or step down voltage andmaintain a stable output voltage. 2. Input voltage DC 5V to 30V, adjustable output voltage DC 5 -24V. 3. Adopting advanced microprocessor, it can accurately adjust outputvoltage and current. 4. High power, stable performance. 5. Widely used for ADC/DAC transport amplifier power supply, RS232RS485 RS422 bus power supply, low-power audio power supply, car audio powersupply, instrument power supply and LCD backlight power supply. Specification:Option: Without terminal, with terminal InputVoltage: DC 5-30V OutputVoltage: DC 5 -24V Max Output Power: 20W Max Conversion Efficiency: 68-89% StaticWorking Current: 2.5mA Size:60*34*15mm / 2.36*1.34*0.59in Weight:Approx. 31-34g Package list:1 * Boost-Buck Converter Module Note: 1. When the output voltage is less than thenominal voltage, this may be because that the load is too high or the the powerof power supply is too low. 2. The negative voltage cannot be usedalone. When using a negative voltage, the same load must be applied to thepositive voltage terminal.