1Pcs MCP23017 Serial Interface Module MCP23017 Can Convert 16-Bit Parallel Data Into Serial Data Of Iic Interface And Can Be Converted To Each Other. Integrated Power-On Reset (POR) Circuit To Reset To The Default State Of The Device. Two Opposing Programmable Interrupt Source Output. Polarity Flip Register Configurable GPIO Input Polarity. Iot Module, Motherboard 1. Working Temperature Range: -40°C~85 °C 2. Working Voltage 1.8v~5.5v 3. Iic Communication Frequency: 1.7mhz Large 4. Working Current: 1ua 5. Icc Slave Device Address 6. Type: Iot Module Colour:black Material:plastic Size:2.75 x 2.2cm Package Contents: 1 x Motherboard Template Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.