5 Pack WiFi Bluetooth Development Board, Compact Design, High Performance for IoT and Embedded Systems Compact Design: Compatible with embedded systems and IoT projects, this development board is small and easy to integrate into tight spaces. Wireless Capabilities: Equipped with both WiFi and Bluetooth, the board provides reliable wireless communication and connectivity for various applications. High Performance: Powered by an advanced chip, it handles demanding tasks efficiently, making it suitable for developers and advanced users. Note: If port instability causes disconnection, you can identify the issue by the sound from the port. Specifications: Color: Black Material: PCB Due to different batches, product appearance and printed text may vary, but this does not affect use. Package Contents: 5 x Development board 10 x Pin headers Only the above contents are included; other items are not. Note: Color may vary slightly due to lighting and display settings. Measurement error allowed: +/- 1-3 cm.