Features: Brand new and high quality Sensors expansion: This product is sensors expansion board, which can provide rich sensors interfaces, making it convenient for users to connect and use various sensors. V4.0 interfaces expansion: The product adopts V4.0 interfaces expansion module design, providing more interfaces option and functional support to meet the needs of users for interfaces expansion. Multi-interfaces expansion: The product provides multiple digital input/output ports, analog input ports and special sensors interfaces, allowing users to flexibly connect and apply various sensors. Simple and easy to use:The operation is simple and easy to understand, and it is convenient and quick without additional welding or complicated wiring. High-quality manufacturing: the product is made from high-quality materials, which has good durability and stability, and can run stably for a long time to ensure the accuracy and reliability of the sensors. Specifications: Material:PCB Operating Voltage: DC5V Input Voltage (recommended): DC7-12V Input Voltage (limits): DC6-20V Buckled Communication Port : Selectable between I2C and UARt. Size:Approx.7x5.8cm/2.76x2.28inch Package Includes: 1x Expansion Board note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.