ITEM NAME:Digital 38KHz IR Receiver Sensors Switch Detector Module Transducer Board Product Description Description: Digital 38KHz IR Receiver Sensors Switch Detector Module Infrared Transducer Boards Feature: 1838 remote control receiver, high sensitivity. With 2 fixed holes, it is easy to install. Frequency data index. Specifications: Working voltage: 5V Output form: digital output Aperture: 3.1mm Size: 30*21*10mm/1.18*0.82*0.39'' Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. Included: 1 x IR Receiver Sensor Module.Included: 1 x IR Receiver Sensor Module. Output form: digital output. Due to the different display and different light, the picture may not show the actual color of the item. If item is defective after 3 months, you can still send it back to us.