Features: Ensure safety of your devices with our 3V to 14V Power Supply Reverse Polarity Protective Module, prevent damage from accidental reverse connection. Supports a wide input voltages ranges and offers output current of 4A, along with LED indicator for power status monitoring. Ideals for electronics enthusiasts, hobbyists, DIYers, and professional engineers reliable solution for power supply Protective. A warning will light up after the input positive and negative poles is incorrectly connection (reverse), and it will not light up during normal operation Perfect for use in drones and various electronic projects, this module safeguards against reverse connection faults that could disrupt functionality. Specifications: Component:PCB Working voltages: 3V-14V Internal resistance: 15mΩ Size:Approx.1.35x0.75cm/0.53x0.3inch Package Includes: 10Pcs Power Reverse Protective Module note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.