[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 ]: 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 sensorscolor:BlueMaterial:PCB+ metalPackage Contents:1 x Pioneer600 expansion board1 x DS18B201 x USB cable1 x RPi copper pole packageOnly the above package content, other 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.