1.No backflow protection function. Connecting the backflow protection diode to the output end can charge various rechargeable batteries (if you are a professional, you can not connect the backflow protection diode) 2.With MPPT function. Support MPPT solar charging 3.Can connect external temperature probe. Support over-temperature protection. Stick the external temperature probe on the battery. Over-temperature will automatically stop charging 4.Note: This product has no output reverse connection protection. Reverse connection of the positive and negative poles of the battery will damage the device. Battery charging requires certain professional knowledge. Non-professionals should not charge directly to prevent fire and explosion XY-7025S CNC DC adjustable voltage regulated power supply constant voltage and current module Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Color: As Shown Material: PCB+Plastic+Electronic Components Package Contents: 1 x DC buck-boost power supply Base Plate 1 x Display