Widely applicable: Widely used in stereo, TV, video machine, disc machine, set-top boxes, digital photo frame, car stereo, remote control toys, satellite receivers, hard disk player, air conditioner, heater, electric fan, lighting and other home appliances. Working voltage: 2.7 ~ 5.5V Frequency: 37.9KHz Receiving angle: 90° Receiving range: 18m， Dimension (each）: 1.5 x 1.8 x 1cm Infrared receiving module adopts 1838 infrared receiving head Can receive infrared signals and output them at the signal output as a digital sequence. You will receive 10 IR receiver modules for your use. built-in infrared dedicated IC, can work under 500 lux light intensity. Receiving angle 90 ° Working voltage 2.7 ~ 5.5V Frequency 37.9KHz Receiving ran.