1.The product only needs to be connected in series with the positive pole of the circuit, without connecting the negative pole 2.No input voltage limit (guaranteed reverse voltage below 40V) 3.4 320A high-current MOS tube, continuous overcurrent 80A, 100A 4.0.9mΩ milliohm conduction resistance, voltage difference of 0.004 volts or so small loss, low heat 5.2US fast response to reverse polarity, input and output are equivalent to diodes. Detect the output voltage is the input immediately shut down the output, the detection value for the millivolt level, the response speed is very fast! Precautions: 1. No limitation on input voltage, but reverse voltage requirement. 2. Reverse voltage is lower than 40V (the difference between the voltage at the output end and the voltage at the input end cannot be higher than the input voltage of 40V) For example: if the input is connected to a 24V power supply, the output can be connected to a 12V, 24V, 36V, 48V, 60V battery, and it cannot be connected to a battery of more than 72V, because 72V-24V input = 48V If the input is not connected to a power supply, and there is no voltage at the input end to input the output can be connected to a voltage of less than 40V. If the input is not connected to the power supply, there is no voltage input at the input, the output can be connected to a voltage below 40V, if the output is connected to a voltage above 40V, the chip be damaged. 3. If it is used for anti-flooding, be sure to disconnect the output first. 4. Because it is not grounded, the output voltage has about 0.3V fluctuation. It is not suitable for voltage products. Specifications: A: bare board Color: Red Material: PCB Package Contents: 1 x Anti-backflow charging 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.