Specification: Product size: 60 * 53 * 14mm/2.36 * 2.09 * 0.55in Net weight: 20g This expansion board provides: 14 I/O pins (servo type with GND, power supply, and signal) 8 analog pins with power output and GND 6 PWM pins 1 servo power input 5 I2C expansion pins AREF output 3.3V output Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Multi-purpose Expansion Board 1. All IO Ports Available: This expansion board provides access to all digital and analog I/O ports on the DUINO NANO, each with standard positive and negative power interfaces. 2. I2C Interface Support: The expansion board also supports the I2C interface on the mainboard, making it easy to connect with other I2C devices. 3. DC Power Supply Interface: This board has a DC power supply interface that allows you to provide external power to high-current devices like servos when USB power is insufficient. 4. Solves Wiring Congestion: This expansion board solves the problem of messy wiring when connecting multiple sensors to the NANO, making it an essential tool for any DUINO project.