37pcs Package included: 1X temperature sensor module 1X vibration switch module 1X Hall magnetic sensor module 1X button switch module 1X infrared emission sensor module 1X passive buzzer module 1X laser head module 1X3-color full color LED module 1X light break sensor module 1X 2-color LED module 1X active buzzer module 1X analog temperature sensor module 1X temperature and humidity sensor 1X3 color LED module 1X mercury switch module 1X photoresistor module 1X1 way relay 1X tilt switch module 1X mini reed module 1X infrared sensor receiving module 1X rocker module 1X linear magnetic Hall sensor 1X large reed module 1X flame sensor module 1X digital temperature sensor module 1X 2-color LED common cathode module 1X tap sensor module 1X infrared sensor module 1X line-sensing sensor module 1X colorful automatic flashing LED module 1X analog Hall magnetic sensor module 1X metal touch sensor module 1X high sensitivity microphone sensor module 1X microphone sound sensor module 1X finger detection heartbeat module 1X rotary encoder module Package: Bag/Box 45pcs Package included: 1 x backplane 1 infrared sensor receiver module 1 laser head sensor module 1 temperature and humidity sensor module 1 infrared emission sensor module 1x5 V relay module 1 x gyroscope 1 finger heart detection module 1 microphone sensitivity sensor module 1 metal touch sensor module 1 flame sensor module 1 x 3 color LED module 1 hunting sensor module 1 linear magnetic sensor 1 rotary encoder module 1 active buzzer module 1 Magic Light Cup module 1 small passive buzzer module 1 digital temperature sensor module 1 tilt switch module 1 analog magnetic Hall sensor 1 x ultrasound 1 mercury opening module 1 Hall magnetic sensor module 1 SMD module LED RGB 1 mini reed module 1 two-color common cathode module LED 3mm 1 photoelectric switch with infrared sensor to avoid obstacles of smart car 1 key switch module 1 x photoresistor 1 test board power module 1 impact sensor module 1 temperature sensor module 1 vibration switch module 1 MICROPHONE sound sensor module 1 large reed module 1 two-color LED module 1 optical interrupt module 1 temperature sensor module 1 MP1584EN step-down module 1 SD card reader module 1 xPS2 joystick game controller 1 automatic LED flashing module 1 DS1302 clock module 1 water level module Package: Bag Package List: 37/45pcs x Sensor Assortment Kit Module Starter for MCU Educ