Specifications: 1) Distance: 50-150 meters 2) Mini size: 5.5cm x 4.5cm x 1.0cm 3) One receiver can work with 400 codes 4) Does not interfere with other remotes and receivers 5) Selector: With 8 dip switches, users can create different combinations for different remotes Input Selector: This receiver works with AC/DC 9V~30V. It is recommended to adjust the PIS according to the input voltage. If the input is greater than 24V, short pin 2; short pins 1 & 2 if input is less than 24V Color: White + Black Material: ABS Programming a new remote: 1) Select the correct brand for the remote to be programmed by moving dip switches up or down. For example, for 433.92MHz Marantec remote controls, move dip switch 7 up 2) Press the learn button. The LED will turn on 3) Press the button on the remote. The LED flashes 4 times, indicating successful programming 4) Repeat step 2 for another button 5) The second channel programming procedure is the same Erase all data from memory: Press and hold either learn button. The LED will start flashing. Continue holding the button until the LED turns off. All saved data will be permanently erased and cannot be recovered Compatibility: All 433.92MHz fixed code remotes Package Contents: 1 x Receiver 3 x Remote Control Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement allows an error of +/- 1-3cm