Module parameters: the input voltage is 4V - 38V (please do not exceed 38V for input), the output voltage is 1.25V - 36V (continuously adjustable), the output current is 0A- 5A (Recommended to use within 4.5A), the output power is suitable for using within 75W. Conversion efficiency: our 5A DC-DC adjustable buck converter can withstand working temperature range from minus 40 to 85 degrees Celsius and support working frequency of 180KHz, its conversion efficiency is 96% higher (the specific efficiency is related to input, output voltage, current and pressure drop), the load adjustment rate shall not exceed 0.8% and the voltage regulation rate shall not exceed 0.8%. Convenient to operate: -down voltage regulator power module has designed with power indicator, short circuit protections (limit current 8A) and over-temperature protection which means the output will be automatically turned off after over-temperature. version: these DC-DC adjustable buck converters contain reverse voltage protection, over-temperature and short-circuit protection, with both input and output voltage range, output power and efficiency, and LM2596 version. Check the size: each regulator power module measures . 5.4 x 2.3 x 1.8 cm/ 2.13 x 0.91 x 0.71 inches, please check whether the size is suitable before purchasing. Colour: blue Material: metal + plastic Package Contents: 8 * 5A DC-DC adjustable drop Voltage converter 8 * heat sink Only the above package content, other products are not included. Note: Light 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.