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) Brand selector: With 8 DIP switches, the user can make different combinations for different brands of remote controls. Power input selector: The receiver can work at AC/DC 9V~30V. However, it is better to change the PIS according to the power input. If the input is higher than 24V, shorten pins 2 and 3; shorten 1&2 if the input is lower than 24V. Color: White + Black Material: ABS Programming 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 remote controls, just move Dip switch 7 to 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 has been successfully programmed. 4) Repeat step 2 for another button. 5) The procedure for programming the second channel is the same. Clear all data on the memory card: Press and hold one of the learning buttons. The LED light will start flashing. Keep the button pressed until the LED light goes out. All data saved on the memory card will be permanently deleted and cannot be recovered. Compatible brands: All 433.92mhz fixed code remote controls. Package contents: 1 x Receiver 3 Remote Controls 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.