Specifications: 1) Distance: 50-150 meters. 2) Very small size: 5.5cm x 4.5cm x 1.0cm. 3) One receiver can work with 400 codes. 4) It does not interfere with other remote controls and receivers. 5) Brand selector: With 8 dip switches, user can create different combinations for different remote controls. Power supply selector: This receiver can work at AC/DC 9V~30V. However, it is better to change the PIS according to the power supply. If the input is greater than 24V, please short pin 2, if the input is less than 24V, please short pin 12. Color: white + black Material: ABS Programming a new remote control 1) Select the correct brand of the remote control to be programmed by moving the dip switches UP or DOWN. For example, 433.92Mhz remote controls, just move Dip switch 7 UP. 2) Press the learning button. The LED light will turn on. 3) Press the button on the remote control, the LED light will flash 4 times. This means the remote control was programmed successfully. 4) Repeat for another button. 5) The second channel's programming procedure is the same. Erase all data from the memory card: Press and hold any of the learning buttons. The LED light will start flashing. Keep pressing the button until the LED light goes out. All data saved on the memory card will be permanently erased and cannot be restored. Compatible: All 433.92mhz fixed code remote controls. Package Contents: 1 x Receiver 3 x Remote Control The above package content only, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.