Specifications: 1) Distance: 50-150 meters. 2) Very mini size: 5.5 cm x 4.5 cm x 1.0 cm. 3) One receiver can work with 400 codes. 4) It does not interfere with other remote controls and receivers. 5) Selector: With 8 dip switches, the user can make different combinations for different remote controls. Input selector: This receiver can work with AC/DC 9V~30V. However, it is better to change the PIS according to the input. If the input is greater than 24V, short circuit pin 2&3; short circuit 1&2 if the input is less than 24V. Color: white + black Material: ABS Programming a new remote control 1) Select the correct brand for the remote control to be programmed by moving the dip switches UP or DOWN. For example, for 433.92Mhz Marantec remote controls, just move Dip switch 7 UP. 2) Press the learning button. The LED will light up. 3) Press the button on the remote control, the LED will flash 4 times. This means the remote control has been successfully programmed. 4) Repeat step 2 for another button. 5) The procedure for programming the second channel is the same. Delete all data from the memory card: Press and hold either learning button. The LED will start flashing. Keep the button pressed until the LED turns off. All saved data on the memory card will be permanently deleted and cannot be recovered. Compatible: All 433.92mhz fixed code remote controls. Package contents: 1 x Receiver 3 x Remote control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be a little different from the real thing. The allowed measurement error is +/- 1-3 cm.