Description/Features: Advanced Protection Technology: the and of ternary lithium batteries with our cutting-edge protection circuitry that against overcharge, short circuit, over-discharge, and overcurrent. Smart Integration: Features Bluetooth connectivity and UART communication, allowing for real-time monitoring and easy integration into existing systems, enhancing user convenience and system reliability. and Reliable: Built with high-quality materials, our protection boards are and engineered to withstand rigorous usage, ensuring a long service life and high performance. Specifications: Due to different batches, there may be differences in product appearance and printed text, which not affect use Colour: as shown Material: ABS Package Contents: 1*Lithium Battery Protection Board 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.