Designed for RPi 3 B + / 3B / 2B / B +. You can remote control or be controlled by infrared remote function. As a device timing switch; car remote control; remote control to play video or music; control your appliances by IR. Operating frequency: 38 KHz. Transmission Distance: 7 to 26.2 ft. Receiving distance: 18 to 65.6 ft. User can program key function and support dual IR transmitter installation (need to install additional transmitter and disconnect SJ1). IR infrared control expansion board can receive and launch, DIY IR dual launch, stronger effect. Supports powerful LIRC software. Using LIRC and expansion boards, users can almost copy all infrared remote control functions (remote control for TV, amplifier, DVD, etc.) and control your different electrical equipments through commands. Support the system, users can use the infrared function of the expansion board in the environment Support dual GPIO buttons, users can set button functions through programming 1. Infrared reception function Working frequency: 38K HZ Receive Distance: 59.1-65.6 ft Angle of reception: +/- 45 degrees 2. Infrared emission function Wavelength: 940 nm. Launch Distance: 23.0-26.2 ft Colour:blue Material:PCB Package Contents: 1 * Expansion Board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.