1 x Infrared sensor receiver module 1 x Laser head sensor module 1 x Temperature and humidity sensor module 1 x Infrared emission sensor module 1 x 5V relay module 1 x For arduino finger detect heartbeat module 1 x Microphone sensitivity sensor module 1 x Metal touch sensor module 1 x Flame sensor module 1 x 3-color LED module 1 x Hunt sensor module 1 x Linear magnetic Hall sensors 1 x Rotary encoder modules 1 x Active buzzer module 1 x Magic Light Cup module 1 x Small passive buzzer module 1 x Digital temperature sensor module 1 x Tilt switch module 1 x Analogy Holzer magnetic sensor 1 x Mercury opening module 1 x Hall magnetic sensor module 1 x RGB LED SMD module 1 x For arduino Mini Reed module 1 x Bicolor LED common cathode module 3MM 1 x Smart car avoid obstacle sensor infrared sensor photoelectric switch 1 x Key switch module 1 x Photoresistor module 1 x For arduino hit sensor module 1 x Temperature sensor module 1 x Vibration switch module 1 x Microphone sound sensor module 1 x Large reed module 1 x Two-color LED module 1 x Optical breaking module 1 x Temperature sensor module 1 x For arduino PS2 Joystick game controller module 1 x Automatically flashing LED module