The development board contains a lot of sensors and wireless technologies. Except STM32L4 microcontroller, you find these things on the board like 64-Mbit Quad-SPI,
Bluetooth 4.1 module,
Sub-GHz module SPSGRF-868 or SPSGRF-915 (868 MHz or 915 MHz),
WiFi module od Inventek ISM43362-M3G-L44 (802.11 b/g/n),
NFC chip M24SR,
omnidirectional microphones MP34DT01,
capacitive digital sensor for relative humidity and temperature HTS221,
3-axis magnetometer LIS3MDL,
3D accelerometer and 3D gyroscope LSM6DSL,
260-1260 hPa absolute digital output barometer LPS22HB,
Time-of-Flight and gesture-detection sensor VL53L0X,
2 push-buttons and UBS OTG conector.