1. Onboard for 40pin GPIO interface, suitable for series motherboards 2. Onboard ICM20948 (3-axis acceleration, 3-axis gyroscope and 3-axis magnetometer), which can detect motion attitude, orientation and magnetic field 3. Onboard SHTC3 digital temperature and humidity sensor, which can sense the temperature and humidity of the environment 4. The onboard LPS22HB atmospheric pressure sensor can sense the atmospheric pressure of the environment 5. The onboard TCS34725 color recognition sensor can identify the color of surrounding objects. On-board ADS1015 chip, 4-channel 12-bit precision , expandable AD function to access more sensors. Lead out the I2C control interface to facilitate access to the main control board such as STM32 Working voltage: 3.3V Communication interface: I2C Logic voltage: 3.3V Product size: 65mm x 30.5mm color:Blue Material:PCB+Metal Package Contents: 1 x sensor expansion board 1 x RPI copper column package 1 x 20Pin long 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.