1. Onboard for 40pin GPIO interface, suitable for series motherboards2. Onboard ICM20948 (3-axis acceleration, 3-axis gyroscope and 3-axis magnetometer), which can detect motion attitude, orientation and magnetic field3. Onboard SHTC3 digital temperature and humidity sensor, which can sense the temperature and humidity of the environment4. The onboard LPS22HB atmospheric pressure sensor can sense the atmospheric pressure of the environment5. The onboard TCS34725 color recognition sensor can identify the color of surrounding objects. On-board ADS1015 chip, 4-channel 12-bit , expandable AD function to access more sensors. Lead out the I2C control interface to facilitate access to the main control board such as STM32Working voltage: 3.3VCommunication interface: I2CLogic voltage: 3.3VProduct size: 65mm x 30.5mmcolor:BlueMaterial:PCB+MetalPackage Contents:1 x sensor expansion board1 x RPI copper column package1 x 20Pin long row Only the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.