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 handle 400 codes. 4) It does not interfere with other remote controls and receivers. 5) Brand selector: With 8 dip switches, the user can make different combinations Compatible with different remote controls. Power selector: This receiver can work with AC/DC 9V~30V. However, it is better to change the PIS depending on the power 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 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, Compatible with 433.92 MHz 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 four times. This means that the remote control has been programmed. 4) Repeat Compatible with another button. 5) The programming procedure Compatible with the second channel is the same. Erase 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 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 Compatible with package contents, others are not included. Note: Light reflections and different displays may cause the color of the product in the image to differ slightly from the actual item. The allowed measurement error is +/- 1-3 cm.