Features: Highly performances and flexibility: for Walnut Pi 1B is a Linux base development board, which use 4 cores ARM A55 processor with a main frequency of up to 1.5GHz. Rich interfaces and expandability: Provides multiple USB interfaces (including usb3.0), Ethernet port, and GPIO pin, supporting multiple peripherals connection. 1GB/2GB/4GB (optional), supports up to 64GB eMMC storage or Microed card expansion, meeting most application needs. Optimized heat dissipation design and usability: The development board adopts aluminum heat sink design, effectively reducing temperature and ensuring long-time stable operation. Pair with a user-friendly operating, supporting multiple open-source software and development tools, enabling developers to quickly get started and develop projects with stability Widely used in education, research and development, and prototyping production: very suitable for education and training, technology research and development, as well as prototyping production for various innovative projects. Specifications: Type: for Walnut Pi 1B Development Board : H616/H618 64-bit/4 cores -A53 processor Main frequency: 1.5GHz Memory: 1GB (521M DDR3 x 2) / 2GB (LPDDR4) / 4GB (LPDDR4) Storage: Microed card supports up to 512G Wireless networking: Double band WiFi (2.4Ghz&5Ghz) + BLE5.0 Wiring networking: 100 megabit Ethernet port Auditory output: 3.5mm auditory port Video output: MicroHD 2.0a supports 4K60fps The interfaces contains:USB 2.0x3;IF receiver×1;Button x1;LED x140Pin GPIO pin 3pin UART (serial port) debugging Power supply: Type C 5V/3A input Size：about 85x56x21mm/3.35x2.2x0.83in Package Includes: 1PC 1B Development Board note: There might be a bit color distortions due to different computer resolution There might be size errors due to different computer resolution