Specifications: 1) Distance: 50-150 meters. 2) Very small 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 Compatible with different remote controls. Input selector: This receiver can work with AC/DC 9V~30V. However, it is better to change the PIS depending on the input. If the input is greater than 24V, short circuit pin 2 and 3; short circuit 1 and 2 if the input is less than 24V. Color: White + Black Material: ABS Program 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, 433.92 MHz Marantec remote controls, just move dip switch 7 UP. 2) Press the learning button. The LED lights up. 3) Press the button on the remote control, the LED flashes four times. This means that the remote control is programmed. 4) Repeat step 2 Compatible with another button. 5) The programming procedure Compatible with the other channel is the same. Delete all data from the memory card: Press and hold either learning button. The LED flashes. Press and hold the button until the LED goes out. All data stored on the memory card is permanently deleted and cannot be recovered. Compatible with: All 433.92 MHz 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 product in the picture to differ slightly from the real item. The allowed measurement error is +/- 1-3 cm.