Specifications: There are total 37 sensor modules. This is a module starter kit, specially developed for beginners. A complete set for Arduino's most commonly used and most useful electronic components. Item Name: Sensor Module Kit Material: PCB Quantity: 37Pcs/Set Features: 37 in 1, Durable, Assortment Kits, Electronic Components Size: 29cm x 19cm x 3.5cm/11.42" x 7.48" x 1.38" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x for PS2 Joystick Game Joystick Module 1 x Infrared Sensor Receiving 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 Obstacle Avoidance Sensor Module 1 x Finger Detection Heartbeat Module 1 x High-sensitivity Microphone Sensor Module 1 x Metal Touch Sensor Module 1 x Flame Sensor Module 1 x 3 Color LED Module 1 x Tracking Sensor Module 1 x Linear Magnetic Hall Sensor 1 x Rotary Encoder Module 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 Optical Breaker Module 1 x Temperature Sensor Module 1 x Two-color LED Common Cathode Module 3MM 1 x Mercury Switch Module 1 x Hall Magnetic Sensor Module 1 x 3 Color Full Color LED Smd Module 1 x Mini Reed Module 1 x Tilt Switch Module 1 x Colorful Automatic Flashing LED Module 1 x Key Switch Module 1 x Photoresistor Module 1 x Vibration Switch Module 1 x Knock Sensor Module 1 x Temperature Sensor Module 1 x Analog Hall Magnetic Sensor 1 x Microphone Sound Sensor Module 1 x Large Reed Module 1 x Two-color LED Module