ITEM NAME:1 set Infrared IR Transmitter Sensor+Infrared Receiver Module For Arduino Hot Descriptio n Description: 100% brand new and high quality Single transistor direct transfer requires programming waveform modulation LED with emission signal for easy observation and debugging Suitable for infrared communication and remote control Modulation: direct transmission without modulation Specifications: Material: Circuit Board Colour: Black Size: Module Size: 13.7mm*27.8mm Supply Voltage: 5V Working Environment: -25~+85Â °C Storage Temperature: -30~+100 Â °C Wavelength: 940nm Signal Type: Digital Signal Infrared Center Wavelength: About 850nm-940nm Infrared Emission Angle: About 20 Degrees Infrared Emission Distance: About 1.3 Meters (5V 38Khz) Package Included: 1 * IR Infrared Transmitter Module 1 * IR Infrared Receiver Sensor Module Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. Whatever the ending's perfect or not, you can't disappear from my world 1 set Infrared IR Transmitter Sensor+Infrared Receiver Module For Arduino Hot.1 IR Infrared Transmitter Module. 1 IR Infrared Receiver Sensor Module. Infrared Center Wavelength: About 850nm-940nm. Infrared Emission Angle: About 20 Degrees. We'd like to settle any problem in a friendly manner.