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: 8 DIP switches allow different combinations for different remotes Power Input Selector: This receiver is compatible with AC/DC 9V–30V. It is recommended to adjust the power input selector according to the voltage used. If the 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 any button on the remote. The LED will flash 4 times, indicating successful programming. 4) Repeat for additional buttons. 5) The second channel follows the same programming procedure. Erase all data from memory: Press and hold the learn button. The LED will begin to flash. 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 differences in display screens may cause slight variations in color compared to the actual item. Measurement tolerance is +/- 1-3cm.