Designed for high reliability occasions, when the external power supply is accidentally cut off, it will quickly switch to supercapacitor discharge. It can provide 10-60S power-off endurance time, and output external power-off signal at the same time, which is enough to meet the on-site data storage. Product size: 90x56mm Positioning hole: 3.5mm Power input: 9~24V DC (5.5x2.1mm DC power socket or KF128 terminal block) Power output: 5V DC (USB2.0 or KF128 terminal block), maximum current 5V3A Supercapacitor: 25F 2 strings Charging current: limited to 1.4A, full capacitor for about 3min Discharge current: 5V3A (continuous) when connected to external power supply, only supercapacitor outputs 5V3A (within 10s) Power failure detection: 2.54mm*2p, 3V indicates external power supply, 0V indicates external power failure Power indicator: DC_IN green indicates external power supply 5V_OUT red indicates 5V is being output Vcap green light brightness changes with capacitor voltage. It is brightest when the capacitor is full and turns off when the capacitor loses power. Instructions for use: If the external power supply is disconnected, the DC_IN red LED will go out after the external power supply capacitor is fully discharged, and the DC_IN signal on the terminal will also change from 3V to 0V. At this time, the supercapacitor will discharge to maintain the output voltage at 5V. The 5V holding time is negatively correlated with the output current. The larger the output current, the shorter the 5V holding time. In the case of 3A, it can only last for 5~6s, and in the case of very small current, it can even last for more than several minutes. The color and appearance of the electronic components from batch to batch, but it will not affect the use Colour:Blue Material:PCB+Electronic component Package Contents: 1 x UPS Module Only the above package content, other products are not included. Note: Light reflection 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.