[Simple I/O device]: dual LED, way rocker, buzzer, necessary for operating for [USB TO UART]: CP2102, supporting serial port terminal control for [Display device]: 0.96 inch OLED, small screen also shows great brilliance [] DS3231, high-precision, with backup battery holder [AD/DA]: PCF8591, 8-bit precision, with terminal input/output interface [GPIO extension]: PCF8574 to sufficient GPIO [Infrared reception]: LFN0038K, supporting remote control for [Pressure sensor]: BMP280, which can detect air pressure and temperature [1-WIRE interface]: 1-WIRE device can be accessed, equipped with DS18B20 [Sensor interface]: convenient access to sensors color:Blue Material:PCB+ metal Package Contents: 1 x Pioneer600 expansion board 1 x DS18B20 1 x USB cable 1 x RPi copper pole package 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.