Enhanced Safety Features: This module is designed to prevent reverse polarity, a common issue during battery installation, ensuring your devices operate safely and Reliable: Built with high-quality materials, these boards are and reliable, perfect for long-term use in various electronic applications Easy Installation: The compact design allows for easy installation in tight spaces, making it ideal for DIY projects and professional setups Wide Compatibility: Suitable for a variety of battery types, enhancing versatility and usability across different devices and charging setups Working voltage: 3V to 14V. Maximum current for long-term operation: 4A (max) (needs to be less than this value for long-term operation). Indicator light: lights up to warn when the positive and negative poles of the input are connected incorrectly (reversely), and does not light up during normal operation. Internal resistance: 15m Due to different batches, there may be differences in product appearance and printed text, which not affect use Color: Green Material: PCB Package Contents: 10 x Anti-Reverse Protector 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.