Features: Unleash your creativity and innovation with 4 Polymer Computer DIY Development Board, essential tool for enthusiasts and professional developer. from PCB materials, this development board ensures durability performances for Computings projects. Whether you're a seasoneds programmer or hobbyist, our user friendly development board to both men and women who share passion for technology. for educational purposes, prototype development, or home Computings solution, this development board provides platform for wide ranges of applications. Enhances your Computings experience with adaptable development board, for individual lookings to explore the possibilities of computer. Specifications: Materials: PCB Styles: 3.7 split, 3.2V same port(optional) Package Includes: 1PC Lithium Battery 100A Polymer note: Please allow 0-1cm error due to manual measurement. make sure do not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item. Thank you!