Specifications: 1) Distance: 50-150 meters. 2) Very mini 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) Selector: With 8 dip switches, 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, please short pin 2&3; Shorten 1&2 if the input is less than 24V. Color: white + black Material: ABS Program a new remote control 1) Select the correct brand of remote control to be programmed by moving the dip switches UP or DOWN. For example, 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 programmed successfully. 4) Repeat step 2 for another button. 5) The programming procedure for the second channel is the same. Delete all data from the memory card: Press and hold either the learning button. The LED light flashes. Press and hold the button until the LED light goes out. All data saved on the memory card will be permanently deleted and cannot be restored. Compatible: All 433.92mhz fixed code remote controls. Package Contents: 1 x Receiver 3 x Remote Control Only the above package contents, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.