Specifications: 1) Operating Distance: 50-150 meters 2) Mini Size: 5.5cm x 4.5cm x 1.0cm 3) One receiver can work with up to 400 codes 4) No interference with other remotes or receivers 5) DIP Switch Selector: Equipped with 8 DIP switches to create different combinations for different remotes Power Input Selector: This receiver operates on AC/DC 9V30V. It is recommended to adjust the power input selector according to the voltage used. If input voltage is above 24V, short pin 2; if below 24V, short pins 1 and 2. Color: White + Black Material: ABS Programming a New Remote: 1) Select the remote brand by setting the DIP switches UP or DOWN. For example, for 433.92MHz remote controls, set DIP switch 7 to UP. 2) Press the learn button. The LED will turn on. 3) Press the button on the remote. The LED will flash 4 times, indicating successful programming. 4) Repeat for additional buttons. 5) The second channel programming procedure is identical. Erase All Data: Press and hold the learn button. The LED will begin flashing. Continue holding until the LED turns off. All stored data will be permanently erased and cannot be recovered. Compatibility: Works with all 433.92MHz fixed code remotes Package Contents: 1 x Receiver 3 x Remote Controls Note: Light reflection and display differences may cause slight variations in color between the image and actual item. Measurement tolerance is +/- 1-3cm.