Full Function Expansion Board Development Kits for Raspberry Pi B+ - Multicolored
User Manual: http://m5.img.dxcdn.com/CDDriver/CD/sku.338435.rar Features: 1. USB to TTL/UART It's Convenient for serial communication with PC. 2. With RTC clock. 3. 4 keys and LED display. 4. Interfaces: 40PIN for Display. `1602LCD interface: I2C interface: SPI interface: UART interface: GPIO for Mix Board: