What is it: it is a USB intelligent temperature control electronic load; with high power, high current, high voltage and intelligent control features. Easy Opeartion: set the load to resume normal operation manually or automatically after releasing the protection condition; can freely set the boot state to be on or off by default; 4-bit led digital display; check the load voltage value / current value / power value; intelligent temperature control cooling fan; Precision adjustable potentiometer; Over-voltage protection / overpower protection / over temperature protection. Protection Function: OVP overvoltage protection (25V-30V overvoltage protection, digital display OVP, permanent damage after more than 30V); OPP over-power protection (load temperature is greater than 80 °C, the device stops working, digital display OTP); OTP over-temperature protection (power greater than 25W, equipment stops working, digital display OPP). Application: can provide 4A, 25V, 25W (3 values can not used