["RAK Wireless WisBlock Base Board RAK19003 The RAK Wireless WisBlock Base Board (RAK19003) is the base block for RAK WisBlock. It is the carrier for the WisBlock Core MCU module and two WisBlock modules with 24 pin WisConnector. It enables engineers and manufacturers to build prototypes, test different types of sensors and develop the application with little effort. And since all WisBlock components and modules are suitable for industrial use, the step from development to mass production is no problem. The WisBlock Base Board supports 3 different power supplies as standard. Depending on the application, you can choose between 5V USB, 3.7V LiPo batteries and 5V solar panels or a combination. The WisBlock Base Board enables low power applications through the ability to turn power on and off for the WisBlock Sensor. The WisBlock Base Board has a size of just 30 x 35 mm, allowing you to create solutions that fit into the smallest cases. RAK19003 WisBlock Mini Base Board Datasheet | RAKwireless Documentation Center", "Simple plug'n'play slots for WisBlock Core MCU, small WisBlock Sensor, WisBlock Extra, small WisBlock Storage and WisBlock Power Module", "Small form factor", "Supports 3 different power sources", "Optimized for low power applications", "I2C, UART, GPIO's and analog input accessible with solder contacts", "2 user-definable LED's", "Reset button", "USB Type C debug port", "1 slot for WisBlock Core MCU", "2 slots for modules with 24-pin WisConnector", "1 x RAK19003", "1 x USB Type-C Cable", "1 set of screws (kit)"]